Draft version 0.5 (2012-01-25)
Shipunov, A. Flora of North Dakota: Checklist. 2012—onwards. http://ashipunov.info/shipunov/fnddb/index.htm
| Family | Species | Counties | Source | Extra info | |
|---|---|---|---|---|---|
| Nyctaginaceae | Abronia fragrans | , snowball sand verbena | USDA | Map | |
| Malvaceae | Abutilon theophrasti | , velvetleaf | USDA | Map | |
| Euphorbiaceae | Acalypha rhomboidea | , common threeseed mercury | STUTSMAN | NDSU, USDA | Map |
| Euphorbiaceae | Acalypha virginica | GRAND FORKS | GFND | Map | |
| Sapindaceae | Acer ginnala | , Amur maple | ROLLETTE | GFND, USDA | Map |
| Sapindaceae | Acer negundo | , boxelder | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, TRAILL, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Sapindaceae | Acer saccharinum | , silver maple | GRAND FORKS, RICHLAND | GFND, USDA | Map |
| Sapindaceae | Acer saccharum | , sugar maple | USDA | Map | |
| Compositae | Achillea millefolium | , common yarrow | ADAMS, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, RANSOM, RICHLAND, ROLETTE, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Achillea sibirica | , Siberian yarrow | BOTTINEAU, WALSH | GFND, MSU, NDSU, USDA | Map |
| Gesneriaceae | Achimenes longiflora | CASS | NDSU | Map | |
| Gramineae | Achnatherum bloomeri | BILLINGS | NDSU | Map | |
| Gramineae | Achnatherum hymenoides | , Indian ricegrass | BILLINGS, BOWMAN, BURLEIGH, BURLIEGH, DUNN, EMMONS, GOLDEN VALLEY, GRANT, MCKENZIE, MCKINZE, MERCER, MORTON, MOUNTRAIL, SIOUX, SIOUX-GRANT, SLOPE, STARK, WILLIAMS | GFND, NPWRC, NDSU, USDA | Map |
| Gramineae | Achnella caduca | , Mandan ricegrass | USDA | Map | |
| Acoraceae | Acorus americanus | , sweetflag | BOTTINEAU, GRAND FORKS, MCHENRY, RANSOM | GFND, GFND, NPWRC, USDA | Map |
| Compositae | Acroptilon repens | , hardheads | DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, MCKENZIE, MCLEAN, MOUNTRAIL, SLOPE, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, NPWRC, NDSU, USDA | Map |
| Ranunculaceae | Actaea alba | GRAND FORKS | GFND | Map | |
| Ranunculaceae | Actaea rubra | , red baneberry | BOTTINEAU, BURKE, BURLEIGH, CASS, DUNN, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, MCHENRY, MCLEAN, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, SHERIDAN, STUTSMAN, WALSH, WARD | GFND, MSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Adenocaulon bicolor | , American trailplant | USDA | Map | |
| Gramineae | Aegilops cylindrica | , jointed goatgrass | USDA | Map | |
| Sapindaceae | Aesculus glabra | FOSTER | GFND | Map | |
| Sapindaceae | Aesculus hippocastanum | WILLIAMS | GFND | Map | |
| Orobanchaceae | Agalinis aspera | , tall false foxglove | DICKEY, EDDY, GRANT, KIDDER, LAMOURE, RANSOM, RICHLAND, STUTSMAN, WELLS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Orobanchaceae | Agalinis tenuifolia | , slenderleaf false foxglove | BENSON, DICKEY, EDDY, GRAND FORKS, GRIGGS, KIDDER, LOGAN, RAMSEY, RANSOM, STUTSMAN | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Labiatae | Agastache foeniculum | , blue giant hyssop | BENSON, BILILNGS, BILLINGS, BOTTINEAU, BURKE, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LOGAN, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, ROLETTE, SHERIDAN-WELLS, SIOUX, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Ageratina altissima | , white snakeroot | RICHLAND, TRAILL | GFND, NPWRC, USDA | Map |
| Compositae | Agoseris glauca | , pale agoseris | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, RAMSEY, RANSOM, SHERIDAN, SLOPE, STARK, STEELE, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Agoseris parviflora | BENSON | GFND | Map | |
| Rosaceae | Agrimonia eupatoria | BOTTINEAU | GFND | Map | |
| Rosaceae | Agrimonia gryposepala | , tall hairy agrimony | DUNN, WALSH | GFND, NDSU, USDA | Map |
| Rosaceae | Agrimonia striata | , roadside agrimony | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SIOUX, SLOPE, STARK, STUTSMAN, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Agropyron caninum | EDDY, SARGENT, SHERIDAN, STUTSMAN, WARD | DK1995, GFND, NPWRC | Map | |
| Gramineae | Agropyron cristatum | , crested wheatgrass | BILLINGS, BURLEIGH, CAVALIER, DICKEY, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, RAMSEY, RENVILLE, RICHALAND, RICHLAND, SARGENT, STARK, STUTSMAN, TOWNER, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Agropyron dasystachyum | BARNES, BILLINGS, EDDY, GOLDEN VALLEY, GRAND FORKS, STUTSMAN | DK1995, GFND, GFND, NPWRC, NPWRC | Map | |
| Gramineae | Agropyron desertorum | , desert wheatgrass | ADAMS, BILLINGS, BOWMAN, BURKE, DIVIDE, DUNN, EMMONS, GRANT, KIDDER, MCLEAN, MORTON, MOUNTRAIL, PIERCE, SHERIDAN, SLOPE, STUTSMAN, WILLIAMS | GFND, NDSU, USDA | Map |
| Gramineae | Agropyron japonicum | MERCER | GFND | Map | |
| Gramineae | Agropyron lanceolatum | BILLINGS, BURKE, DIVIDE, DUNN, GOLDEN VALLEY, MCKENZIE, MERCER, MORTON, MOUNTRAIL, MOUNTRIAL, SLOPE, STARK, WARD, WILLIAMS | NDSU | Map | |
| Gramineae | Agropyron pauciflorum | BOTTINEAU, WALSH | GFND | Map | |
| Gramineae | Agropyron riparium | GRAND FORKS, MORTON, OLIVER | GFND | Map | |
| Gramineae | Agropyron spicatum | BILLINGS, GOLDEN VALLEY, SLOPE | GFND, NDSU | Map | |
| Gramineae | Agropyron subsecundum | BILLINGS, BOTTINEAU, GRAND FORKS, MCHENRY, SLOPE, STUTSMAN, WALSH | GFND, GFND | Map | |
| Gramineae | Agropyron trachycaulum | BILLINGS, GRAND FORKS, HETTINGER, MERCER, PIERCE, ROLETTE, SHERIDAN, SLOPE | GFND | Map | |
| Caryophyllaceae | Agrostemma githago | , common corncockle | BENSON, GRANT, MORTON, RANSOM, WARD, WILLIAMS | GFND, NDSU, USDA | Map |
| Gramineae | Agrostis capillaris | , colonial bentgrass | USDA | Map | |
| Gramineae | Agrostis exarata | DUNN | NDSU | Map | |
| Gramineae | Agrostis gigantea | , redtop | BENSON, BILLINGS, DICKEY, GRAND FORKS, OLIVER, WALSH | GFND, NDSU, USDA | Map |
| Gramineae | Agrostis hyemalis | BILLINGS, BURKE, DUNN, MCINTOSH, MOUNTRAIL, RANSOM, STUTSMAN, WARD | GFND, GFND, MSU, NDSU, NPWRC | Map | |
| Gramineae | Agrostis perennans | , upland bentgrass | USDA | Map | |
| Gramineae | Agrostis scabra | , rough bentgrass | BARNES, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, DUNNE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WILLIAMS | DK1995, GFND, NDSU, USDA | Map |
| Gramineae | Agrostis stolonifera | , creeping bentgrass | BOWMAN, BURKE, BURLEIGH, CASS, DUNN, EDDY, EMMONS, LAMOURE, MCINTOSH, MOUNTRAIL, RANSOM, RICHLAND, ROLETTE, SARGENT, STARK, STUTSMAN, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Malvaceae | Alcea rosea | , hollyhock | GRAND FORKS | GFND, USDA | Map |
| Alismataceae | Alisma arcuatum | BENSON | GFND | Map | |
| Alismataceae | Alisma gramineum | , narrowleaf water plantain | BILLINGS, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, HETTINGER, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, SLOPE, STARK, STUTSMAN, TRAILL, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Alismataceae | Alisma plantago-aquatica | BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | NDSU, NPWRC | Map | |
| Alismataceae | Alisma subcordatum | , American water plantain | BENSON, BURKE, CAVALIER, EDDY, GRANDFORKS, GRAND FORKS, MCLEAN, MOUNTRAIL, OLIVER, WARD | DK1995, GFND, MSU, USDA | Map |
| Alismataceae | Alisma triviale | , northern water plantain | EDDY | DK1995, USDA | Map |
| Amaryllidaceae | Allium burdickii | , narrowleaf wild leek | USDA | Map | |
| Amaryllidaceae | Allium canadense | , meadow garlic | USDA | Map | |
| Amaryllidaceae | Allium geyeri | GFND | Map | ||
| Amaryllidaceae | Allium stellatum | , autumn onion | BARNES, BENSON, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCLEAN, OLIVER, RANSOM, RICHLAND, SHERIDAN, SIOUX, STUTSMAN, WARD, WELLS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Amaryllidaceae | Allium textile | , textile onion | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Amaryllidaceae | Allium tricoccum | , ramp | GRAND FORKS, RANSOM, RICHLAND | GFND, GFND, NPWRC, USDA | Map |
| Compositae | Almutaster pauciflorus | , alkali marsh aster | BILLINGS, BURKE, DIVIDE, GRANT, MOUNTRAIL, WILLIAMS | NDSU, USDA | Map |
| Betulaceae | Alnus incana | , gray alder | EDDY, RANSOM, RICHLAND, WALSH | DK1995, GFND, NPWRC, USDA | Map |
| Gramineae | Alopecurus aequalis | , shortawn foxtail | BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MOUNTRAIL, NELSON, RAMSEY, RANSOM, SHERIDAN, STARK, STUTSMAN, TOWNER, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Alopecurus arundinaceus | , creeping meadow foxtail | BURLEIGH, EMMONS, LAMOURE, LOGAN, MCLEAN | NDSU, USDA | Map |
| Gramineae | Alopecurus carolinianus | , Carolina foxtail | BURKE, CAVALIER, DIVIDE, KIDDER, MCKENZIE, MORTON, MOUNTRAIL, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Gramineae | Alopecurus geniculatus | , water foxtail | DIVIDE, EMMONS, MCKENZIE, MERCER, MOUNTRAIL, SLOPE | GFND, NDSU, USDA | Map |
| Gramineae | Alopecurus pratensis | , meadow foxtail | WALSH | GFND, USDA | Map |
| Malvaceae | Althaea officinalis | , common marshmallow | USDA | Map | |
| Cruciferae | Alyssum alyssoides | BENSON, STARK | GFND | Map | |
| Cruciferae | Alyssum desertorum | , desert madwort | BILLINGS, GOLDEN VALLEY, MCKENZIE, STARK | NDSU, USDA | Map |
| Amaranthaceae | Amaranthus albus | , prostrate pigweed | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MORTON, MOUNTRAIL, PIERCE, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NPWRC, MSU, NDSU, USDA | Map |
| Amaranthaceae | Amaranthus blitoides | , mat amaranth | BILLINGS, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, LAMOURE, LOGAN, MCINSTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WILLIAMS | GFND, NDSU, USDA | Map |
| Amaranthaceae | Amaranthus hybridus | , slim amaranth | DICKEY, GRAND FORKS | GFND, NPWRC, USDA | Map |
| Amaranthaceae | Amaranthus retroflexus | , redroot amaranth | BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Amaranthaceae | Amaranthus tuberculatus | , roughfruit amaranth | BURLEIGH, SLOPE, STUTSMAN, WARD | MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Amberboa moschata | CASS, STARK | NDSU, NDSU | Map | |
| Compositae | Ambrosia acanthicarpa | , flatspine bur ragweed | USDA | Map | |
| Compositae | Ambrosia artemisiifolia | , annual ragweed | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, GRIGGS, HETTINGER, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, RAMSEY, RANSOM, RENVILLE, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Ambrosia psilostachya | , Cuman ragweed | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, RICHLAND, SHERIDAN, SIOUX, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Ambrosia tomentosa | , skeletonleaf bur ragweed | USDA | Map | |
| Compositae | Ambrosia trifida | , great ragweed | BENSON, BILLINGS, BOWMAN, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Amelanchier alnifolia | , Saskatoon serviceberry | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RICHLAND, ROLETTE, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, NDSU, MSU, NPWRC, USDA | Map |
| Rosaceae | Amelanchier bartramiana | GRAND FORKS | GFND | Map | |
| Rosaceae | Amelanchier humilis | , low serviceberry | EMMONS, GRANT, KIDDER, MCINTOSH, MCLEAN, MERCER, SIOUX, SLOPE, STARK, STUTSMAN, WARD | MSU, USDA, NDSU, USDA | Map |
| Rosaceae | Amelanchier sanguinea | , roundleaf serviceberry | USDA | Map | |
| Lythraceae | Ammannia coccinea | , valley redstem | CASS, EMMONS, MCINTOSH, RICHLAND, STUTSMAN | NDSU, NPWRC, USDA | Map |
| Lythraceae | Ammannia robusta | , grand redstem | USDA | Map | |
| Leguminosae | Amorpha canescens | , leadplant | BENSON, BILLINGS, BURLEIGH, EDDY, EMMONS, FOSTER, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MERCER, MORTON, RANSOM, RICHLAND, SARGENT, SHERIDAN, SIOUX, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Amorpha fruticosa | , desert false indigo | BURLEIGH, GRAND FORKS, LAMOURE, MCLEAN, MORTON, STARK, WALSH | GFND, NDSU, NPWRC, USDA | Map |
| Leguminosae | Amorpha nana | , dwarf false indigo | BURLEIGH, DICKEY, EDDY, EMMONS, FOSTER, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MOROTN, MORTON, OLIVER, SHERIDAN, STARK, STUTSMAN | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Leguminosae | Amphicarpaea bracteata | , American hogpeanut | BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, GRIGGS, LAMOURE, MCLEAN, MORTON, RICHLAND, STUTSMAN | DK1995, GFND, NPWRC, NDSU, USDA | Map |
| Leguminosae | Amphicarpaea monoica | RICHLAND | GFND | Map | |
| Boraginaceae | Amsinckia lycopsoides | , tarweed fiddleneck | USDA | Map | |
| Boraginaceae | Amsinckia menziesii | , Menzies' fiddleneck | USDA | Map | |
| Primulaceae | Anagallis minima | , chaffweed | BURKE, GRAND FORKS, LOGAN, RANSOM, SLOPE | GFND, MSU, NDSU, USDA | Map |
| Compositae | Anaphalis margaritacea | MORTON | GFND, NDSU | Map | |
| Boraginaceae | Anchusa arvensis | , small bugloss | MCKENZIE, STARK, STUTSMAN | NDSU, USDA | Map |
| Gramineae | Andropogon gerardii | , big bluestem | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Gramineae | Andropogon hallii | , sand bluestem | BILLINGS, EMMONS, GRANT, KIDDER, LOGAN, MCHENRY, MCKENZIE, MERCER, MORTON, OLIVER, RANSOM, RICHLAND, SIOUX, SLOPE | GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Andropogon scoparius | BENSON, BILLINGS, BOTTINEAU, CAVALIER, DICKEY, GRAND FORKS, MCHENRY, SLOPE, STUTSMAN, WALSH | GFND, GFND, NPWRC, NPWRC | Map | |
| Primulaceae | Androsace occidentalis | , western rockjasmine | BILLINGS, DIVIDE, EDDY, GRAND FORKS, MCHENRY, MOUNTRAIL, STUTSMAN, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Primulaceae | Androsace septentrionalis | , pygmyflower rockjasmine | BENSON, BILLINGS, BURKE, DIVIDE, EMMONS, GOLDEN VALLEY, KIDDER, LOGAN, MOUNTRAIL, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | GFND, GFND, MSU, NDSU, USDA | Map |
| Ranunculaceae | Anemone canadensis | , Canadian anemone | BENSON, BOTTINEAU, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Anemone cylindrica | , candle anemone | BENSON, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Anemone hirsutissima | GRAND FORKS | GFND | Map | |
| Ranunculaceae | Anemone hudsoniana | BENSON, GRAND FORKS | GFND | Map | |
| Ranunculaceae | Anemone multifida | , Pacific anemone | BURKE, GOLDEN VALLEY, MOUNTRAIL, WILLIAMS | MSU, NDSU, USDA | Map |
| Ranunculaceae | Anemone nemorosa | GRAND FORKS | GFND | Map | |
| Ranunculaceae | Anemone parviflora | , smallflowered anemone | USDA | Map | |
| Ranunculaceae | Anemone patens | ADAMS, BENSON, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WELSL, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, USDA, MSU, NPWRC | Map | |
| Ranunculaceae | Anemone pennsylvanica | GRAND FORKS | GFND | Map | |
| Ranunculaceae | Anemone quinquefolia | , wood anemone | CAVALIER, GRAND FORKS, PEMBINA GORGE | GFND, NPWRC, USDA | Map |
| Ranunculaceae | Anemone virginiana | , tall thimbleweed | BENSON, DUNN, EMMONS, GRAND FORKS, MERCER, MOUNTRAIL, OLIVER, RANSOM, ROLETTE, WALSH, WILLIAMS | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Umbelliferae | Anethum graveolens | , dill | BILLINGS, DICKEY, KIDDER, MCINTOSH, MORTON, STARK | GFND, NDSU, USDA | Map |
| Compositae | Antennaria howellii | , Howell's pussytoes | BILLINGS, BURKE, DUNN, EMMONS, GOLDEN VALLEY, MORTON, MOUNTRAIL, SIOUX, SLOPE, STARK, WILLIAMS | NDSU, USDA | Map |
| Compositae | Antennaria microphylla | , littleleaf pussytoes | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, CASS, CAVALIER, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, KIDDER, MCHENRY, MCKENZIE, MCLEAN, MOUNTRAIL, OLIVER, PEMBINA, PIERCE, RAMSEY, RENVILLE, ROLETTE, SHERIDAN, SLOPE, STARK, STEELE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, USDA | Map |
| Compositae | Antennaria neglecta | , field pussytoes | BENSON, BILLINGS, BURKE, CASS, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Antennaria neodioica | BILLINGS, GRAND FORKS, SLOPE | GFND | Map | |
| Compositae | Antennaria parlinii | , Parlin's pussytoes | MCKENZIE, WARD | MSU, NDSU, USDA | Map |
| Compositae | Antennaria parvifolia | , small-leaf pussytoes | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, HETTINGER, KIDDER, LAMOARE, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, PEMBINA, PIERCE, RENVILLE, RICHLAND, SHERIDAN, SLOPE, STARK, STEELE, STUTSMAN, WARD, WELLS, WILKINS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Antennaria plantaginifolia | BILLINGS, DUNN, MCKENZIE, PEMBINA | NPWRC, NDSU, NPWRC | Map | |
| Compositae | Antennaria rosea | , rosy pussytoes | BILLINGS, BILLLINGS, BOWMAN, BURLEIGH, HETTINGER, KIDDER, SARGENT, SLOPE, STUTSMAN | NDSU, NPWRC, USDA | Map |
| Compositae | Anthemis arvensis | , corn chamomile | USDA | Map | |
| Compositae | Anthemis cotula | , stinking chamomile | BENSON, BILLINGS, GOLDEN VALLEY, RAMSEY, SHERIDAN, WARD | GFND, MSU, NDSU, USDA | Map |
| Compositae | Anthemis tinctoria | , golden chamomile | USDA | Map | |
| Gramineae | Anthoxanthum monticola | DIVIDE, EDDY, MOUNTRAIL, RAMSEY, STUTSMAN, WILLIAMS | NDSU | Map | |
| Leguminosae | Anthyllis vulneraria | , common kidneyvetch | USDA | Map | |
| Plantaginaceae | Antirrhinum majus | GRAND FORKS | GFND | Map | |
| Leguminosae | Apios americana | , groundnut | USDA | Map | |
| Apocynaceae | Apocynum androsaemifolium | , spreading dogbane | BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CAVALIER, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, MCKENZIE, MCLEAN, MOUNTRAIL, RAMSAY, RANSOM, SLOPE, STARK, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Apocynaceae | Apocynum cannabinum | , Indianhemp | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SARGENT, SHERIDAN, SLOPE, STARK, STEELE, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NPWRC, MSU, NDSU, USDA | Map |
| Apocynaceae | Apocynum floribundum | BOTTINEAU | GFND, USDA | Map | |
| Ranunculaceae | Aquilegia brevistyla | NDSU | Map | ||
| Ranunculaceae | Aquilegia canadensis | , red columbine | BENSON, BOTTINEAU, EDDY, GRAND FORKS, RANSOM, RICHLAND, ROLLETTE, STUTSMAN, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Cruciferae | Arabidopsis thaliana | GFND | Map | ||
| Cruciferae | Arabis canadensis | , sicklepod | USDA | Map | |
| Cruciferae | Arabis divaricarpa | BILLINGS, BURKE, DIVIDE, KIDDER, MOUNTRAIL, RAMSEY, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC | Map | |
| Cruciferae | Arabis drummondii | , Drummond's rockcress | BENSON, DUNN, EDDY, GRAND FORKS, PEMBINA, RAMSEY, WARD | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Arabis eschscholtziana | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STUTSMAN, WARD, WELLS, WILLIAMS | NDSU | Map | |
| Cruciferae | Arabis fendleri | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, KIDDRE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | NDSU | Map | |
| Cruciferae | Arabis glabra | , tower rockcress | BILLINGS, BURKE, DUNN, GOLDEN VALLEY, GRANT, MOUNTRAIL, WILLIAMS | MSU, NDSU, USDA | Map |
| Cruciferae | Arabis hirsuta | , hairy rockcress | BENSON, BILLINGS, EDDY, GRAND FORKS, RAMSEY, RANSOM, SIOUX, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Cruciferae | Arabis holboellii | , Holboell's rockcress | BILLINGS, BOTTINEAU, DIVIDE, EDDY, GRAND FORKS, MORTON, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Arachis hypogaea | GRAND FORKS | GFND | Map | |
| Araliaceae | Aralia nudicaulis | , wild sarsaparilla | BENSON, BOTTINEAU, BURKE, CAVALIER, DUNN, EDDY, GRAND FORKS, GRIGGS, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, RANSOM, RICHLAND, ROLETTE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Arctium lappa | , greater burdock | GRAND FORKS | GFND, USDA | Map |
| Compositae | Arctium minus | , lesser burdock | BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RAMSEY, RANSOM, RICHLAND, SLOPE, STARK, STUTSMAN, WARD | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Arctium tomentosum | , woolly burdock | CASS | NDSU, USDA | Map |
| Ericaceae | Arctostaphylos coloradensis | ADAMS, BILLINGS, DUNN, GOLDEN VALLEY, HETTINGER, MCKENZIE, MORTON, MOUNTRAIL, SLOPE | NDSU | Map | |
| Ericaceae | Arctostaphylos uva-ursi | , kinnikinnick | DUNN, MCHENRY | GFND, NPWRC, USDA | Map |
| Papaveraceae | Argemone albiflora | BILLINGS, MCKENZIE | NDSU | Map | |
| Papaveraceae | Argemone polyanthemos | , crested pricklypoppy | MERCER | NDSU, USDA | Map |
| Rosaceae | Argentina anserina | , silverweed cinquefoil | ADAMS, BENSON, BOTTINEAU, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PIERCE, ROLETTE, SHERIDAN, STARK, STUTSMAN, TOWNER, WALSH, WARD, WILLIAMS | GFND, DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Araceae | Arisaema triphyllum | , Jack in the pulpit | GRAND FORKS, RICHLAND | GFND, GFND, NPWRC, USDA | Map |
| Gramineae | Aristida basiramea | , forked threeawn | USDA | Map | |
| Gramineae | Aristida longiseta | BILLINGS, MORTON, MOUNTRAIL, SIOUX, SLOPE, WILLIAMS | GFND, MSU, NPWRC | Map | |
| Gramineae | Aristida purpurascens | BURKE | MSU | Map | |
| Gramineae | Aristida purpurea | , purple threeawn | ADAMS, BILLINGS, BURLEIGH, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, GRIGGS, LAMOURE, MCHENRY, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SLOPE, STARK, WILLIAMS | DK1995, NDSU, USDA | Map |
| Cruciferae | Armoracia rusticana | BILLINGS, BOWMAN, BURLEIGH, DIVIDE, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, OLIVER, STARK, STUTSMAN, WILOISM | GFND, NDSU, NPWRC, USDA | Map | |
| Compositae | Arnica cordifolia | , heartleaf arnica | USDA | Map | |
| Compositae | Arnica fulgens | , foothill arnica | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GRANT, KIDDER, LOGAN, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, SHERIDAN, SLOPE, STARK, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Artemisia absinthium | , absinthium | BARNES, BENSON, BILLINGS, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MORTON, OLIVER, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Artemisia arctica | GFND | Map | ||
| Compositae | Artemisia aromatica | GFND | Map | ||
| Compositae | Artemisia biennis | , biennial wormwood | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MCINTOSH, MCLEAN, MOUNTRAIL, RAMSEY, SHERIDAN, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Artemisia borealis | GOLDEN VALLEY, WARD, WILLIAMS | GFND, NDSU | Map | |
| Compositae | Artemisia campestris | , field sagewort | BILLINGS, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, PIERCE, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Artemisia cana | , silver sagebrush | BILLINGS, BOWMAN, BURLEIGH, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, MCHENRY, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Compositae | Artemisia caudata | BENSON, BILLINGS, CAVALIER, GRAND FORKS, GRIGGS, MCHENRY | GFND, NDSU | Map | |
| Compositae | Artemisia dracunculus | , tarragon | BILLINGS, BOWMAN, BURLEIGH, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRANT, GRIGGS, KIDDER, MCHENRY, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Artemisia filifolia | GFND | Map | ||
| Compositae | Artemisia frigida | , prairie sagewort | BENSON, BILLINGS, BURKE, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, HETTINGER, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Artemisia gnaphalodes | GFND | Map | ||
| Compositae | Artemisia longifolia | , longleaf wormwood | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DUNN, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, SIOUX, SLOPE, STARK, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Artemisia ludoviciana | , white sagebrush | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, TRAILL, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Artemisia scopulorum | GFND | Map | ||
| Compositae | Artemisia serrata | , sawtooth wormwood | USDA | Map | |
| Compositae | Artemisia tridentata | , big sagebrush | BILLINGS, BOWMAN, GOLDEN VALLEY, MCKENZIE, SLOPE | GFND, NDSU, NPWRC, USDA | Map |
| Aristolochiaceae | Asarum canadense | , Canadian wildginger | CAVALIER, RICHLAND | GFND, NPWRC, USDA | Map |
| Apocynaceae | Asclepias incarnata | , swamp milkweed | CASS, EDDY, EMMONS, GRAND FORKS, KIDDER, LOGAN, MCHENRY, RANSOM, RICHLAND, SARGENT, STUTSMAN, TRAILL, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Apocynaceae | Asclepias lanuginosa | , sidecluster milkweed | BILLINGS, GRANT, STUTSMAN | GFND, NDSU, USDA | Map |
| Apocynaceae | Asclepias ovalifolia | , oval-leaf milkweed | BENSON, BOTTINEAU, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PIERCE, SARGENT, STEELE, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Apocynaceae | Asclepias pumila | , plains milkweed | BILLINGS, EMMONS, GOLDEN VALLEY, GRANT, MORTON, SIOUX, STUTSMAN | GFND, NDSU, NPWRC, USDA | Map |
| Apocynaceae | Asclepias speciosa | , showy milkweed | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, RANSOM, RICHLAND, ROLETTE, SARGENT, SHERIDAN, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Apocynaceae | Asclepias sullivantii | , prairie milkweed | USDA | Map | |
| Apocynaceae | Asclepias syriaca | , common milkweed | BARNES, BENSON, BOTTINEAU, CASS, CAVALIER, DICKEY, EDDY, GRAND FORKS, PEMBINA, RAMSEY, RANSOM, RICHLAND, TRAIL, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Apocynaceae | Asclepias verticillata | , whorled milkweed | BARNES, BARNES/RANSOM, BENSON, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOORE, LAMOURE, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RANSOM, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STEELE, STUTSMAN, TRAILL, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Apocynaceae | Asclepias viridiflora | , green comet milkweed | BARNES, BENSON, BILLINGS, EDDY, MCHENRY, MOUNTRAIL, PIERCE, RANSOM, RENVILLE, RICHLAND, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Asparagaceae | Asparagus officinalis | , garden asparagus | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MOUNTRAIL, OLIVER, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, USDA | Map |
| Boraginaceae | Asperugo procumbens | , German-madwort | SLOPE, WILLIAMS | GFND, USDA | Map |
| Boraginaceae | Asperula orientalis | , Oriental asperula | CASS | NDSU, USDA | Map |
| Compositae | Aster ericoides | GRAND FORKS | GFND | Map | |
| Compositae | Aster simplex | NELSON | GFND | Map | |
| Leguminosae | Astragalus aboriginum | GRANT, WILLIAMS | GFND, NPWRC | Map | |
| Leguminosae | Astragalus accumbens | BILLINGS, BOWMAN, BURKE, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, LAMOURE, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | NDSU | Map | |
| Leguminosae | Astragalus adsurgens | BILLINGS, EDDY, STUTSMAN | DK1995, GFND, NPWRC | Map | |
| Leguminosae | Astragalus agrestis | , purple milkvetch | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus australis | , Indian milkvetch | USDA | Map | |
| Leguminosae | Astragalus bigelovii | SHERIDAN | GFND | Map | |
| Leguminosae | Astragalus bisulcatus | , twogrooved milkvetch | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, HETTINGER, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MOUNTRAIL, PIERCE, RAMSEY, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus canadensis | , Canadian milkvetch | BILLINGS, BOWMAN, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LOGAN, MCINTOSH, MCLEAN, MERCER, MOUNTRAIL, RANSOM, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus caryocarpus | GRAND FORKS, LAMOURE, SLOPE | GFND | Map | |
| Leguminosae | Astragalus ceramicus | , painted milkvetch | SHERIDAN, SLOPE | GFND, USDA | Map |
| Leguminosae | Astragalus cicer | RICHLAND | GFND | Map | |
| Leguminosae | Astragalus crassicarpus | , groundplum milkvetch | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus decumbens | GRAND FORKS | GFND | Map | |
| Leguminosae | Astragalus deflexus | GFND | Map | ||
| Leguminosae | Astragalus distortus | RANSOM | GFND | Map | |
| Leguminosae | Astragalus drummondii | , Drummond's milkvetch | WILLIAMS | GFND, USDA | Map |
| Leguminosae | Astragalus flexuosus | , flexile milkvetch | BENSON, BILLINGS, BURKE, DIVIDE, DUNN, EDDY, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, RANSOM, SHERIDAN, SLOPE, STARK, STUSTMAN, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus gilviflorus | , plains milkvetch | BILLINGS, BURKE, BURKE`, BURLEIGH, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STUTSMAN, WARD, WILLIAMS | DK1995, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus gracilis | , slender milkvetch | SLOPE | GFND, USDA | Map |
| Leguminosae | Astragalus hyalinus | , summer milkvetch | USDA | Map | |
| Leguminosae | Astragalus kentrophyta | , spiny milkvetch | ADAMS, BILLINGS, DUNN, EMMONS, GOLDEN VALLEY, GRANT, MCKENZIE, MORTON, SLOPE, STARK, STUTSMAN, WARD | NDSU, USDA | Map |
| Leguminosae | Astragalus laxmannii | , Laxmann's milkvetch | BILLINGS, BOWMAN, BURKE, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | MSU, NDSU, USDA | Map |
| Leguminosae | Astragalus lotiflorus | , lotus milkvetch | EDDY, STUTSMAN, WARD | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus missouriensis | , Missouri milkvetch | BILLINGS, BOWMAN, BURKE, EDDY, GRAND FORKS, MCKENZIE, MOUNTRAIL, SLOPE, STUTSMAN, WARD | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus neglectus | , Cooper's milkvetch | USDA | Map | |
| Leguminosae | Astragalus nelsonianus | BILLINGS, BURKE, DIVIDE, EMMONS, GOLDEN VALLEY, GRANT, MCKENZIE, MCLEAN, MOUNTRAIL, SIOUX, STARK, WARD, WELSH, WILLIAMS | NDSU | Map | |
| Leguminosae | Astragalus nitidus | GFND | Map | ||
| Leguminosae | Astragalus pectinatus | , narrowleaf milkvetch | BURKE, MCKENZIE, MERCER, MOUNTRAIL, WARD, WILLIAMS | GFND, MSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus plattensis | , Platte River milkvetch | WARD | MSU, USDA | Map |
| Leguminosae | Astragalus purshii | , woollypod milkvetch | BOWMAN, SLOPE | NDSU, USDA | Map |
| Leguminosae | Astragalus racemosus | , cream milkvetch | BENSON, BOWMAN, GRANT, MORTON, SHERIDAN, SIOUX, SLOPE, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus spatulatus | , tufted milkvetch | BILLINGS, BOWMAN, GOLDEN VALLEY, MCKENZIE, SLOPE | GFND, NDSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus striatus | BENSON, GRAND FORKS, SLOPE | GFND | Map | |
| Leguminosae | Astragalus tenellus | , looseflower milkvetch | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, EDDY, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LOGAN, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, NELSON, OLIVER, RAMSEY, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Astragalus triphyllus | BILLINGS, MCKENZIE, SLOPE, WARD, WILLIAMS | GFND, GFND, MSU | Map | |
| Leguminosae | Astragalus vexilliflexus | , bentflower milkvetch | DUNN, STARK, WARD | GFND, MSU, USDA | Map |
| Polypodiaceae | Athyrium filix-femina | , common ladyfern | PEMBINA, RICHLAND | GFND, NPWRC, USDA | Map |
| Amaranthaceae | Atriplex aptera | , moundscale | USDA | Map | |
| Amaranthaceae | Atriplex argentea | , silverscale saltbush | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GRAND FORKS, LAMOURE, MCKENZIE, MORTON, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Amaranthaceae | Atriplex canescens | , fourwing saltbush | USDA | Map | |
| Amaranthaceae | Atriplex confertifolia | , shadscale saltbush | BILLINGS, SLOPE | GFND, NDSU, NPWRC, USDA | Map |
| Amaranthaceae | Atriplex cuneata | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | NDSU | Map | |
| Amaranthaceae | Atriplex gardneri | , Gardner's saltbush | BILLINGS, GOLDEN VALLEY, MCKENZIE, MOUNTRAIL, SIOUX, SLOPE, WARD | GFND, NPWRC, MSU, USDA | Map |
| Amaranthaceae | Atriplex hortensis | , garden orache | DIVIDE, GRAND FORKS, MOUNTRAIL, SHERIDAN, WARD, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Amaranthaceae | Atriplex micrantha | , twoscale saltbush | BILLINGS, BOWMAN, STARK, WILLIAMS | NDSU, USDA | Map |
| Amaranthaceae | Atriplex mucronata | GFND | Map | ||
| Amaranthaceae | Atriplex nuttalli | BILLINGS | GFND | Map | |
| Amaranthaceae | Atriplex patula | , spear saltbush | BENSON, GRAND FORKS, KIDDER, MOUNTRAIL, STUTSMAN | GFND, MSU, NPWRC, USDA | Map |
| Amaranthaceae | Atriplex powellii | , Powell's saltweed | USDA | Map | |
| Amaranthaceae | Atriplex prostrata | , triangle orache | GRAND FORKS, MOUNTRAIL, WARD | GFND, MSU, USDA | Map |
| Amaranthaceae | Atriplex rosea | , tumbling saltweed | USDA | Map | |
| Amaranthaceae | Atriplex subspicata | , saline saltbush | BURKE, EDDY | DK1995, MSU, USDA | Map |
| Gramineae | Avena fatua | , wild oat | BARNES, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MOUNTRAIL, OLIVER, RAMSEY, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Avena sativa | , common oat | BURLEIGH, HETTINGER, KIDDER, MCINTOSH, MERCER | GFND, NDSU, USDA | Map |
| Gramineae | Avenula hookeri | , spikeoat | BOTTINEAU, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Polygonaceae | Axyris amaranthoides | , Russian pigweed | BURKE, MOUNTRAIL | MSU, USDA | Map |
| Plantaginaceae | Bacopa rotundifolia | , disk waterhyssop | MOUNTRAIL, STUTSMAN, WARD | MSU, NPWRC, USDA | Map |
| Compositae | Balsamorhiza sagittata | , arrowleaf balsamroot | USDA | Map | |
| Cruciferae | Barbarea vulgaris | , garden yellowrocket | USDA | Map | |
| Amaranthaceae | Bassia scoparia | , burningbush | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Gramineae | Beckmannia syzigachne | , American sloughgrass | BARNES, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, PEMBINA, RAMSEY, RAMSOM, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, TRAIL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Bellis perennis | , lawndaisy | USDA | Map | |
| Berberidaceae | Berberis thunbergii | , Japanese barberry | USDA | Map | |
| Berberidaceae | Berberis vulgaris | , common barberry | BOWMAN, EDDY | DK1995, NDSU, USDA | Map |
| Cruciferae | Berteroa incana | , hoary alyssum | BURKE, BURLEIGH, CAVALIER, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MORTON, SHERIDAN, STUTSMAN, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Umbelliferae | Berula erecta | , cutleaf waterparsnip | EDDY, MCHENRY, MERCER, RANSOM, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Amaranthaceae | Beta vulgaris | GRAND FORKS | GFND | Map | |
| Betulaceae | Betula alba | MCHENRY, ROLETTE | GFND | Map | |
| Betulaceae | Betula glandulosa | BOTTINEAU, KIDDER, MCHENRY | NDSU, NPWRC | Map | |
| Betulaceae | Betula occidentalis | , water birch | BILLINGS, DUNN, MCKENZIE, SLOPE | GFND, NDSU, NDSU, NPWRC, USDA | Map |
| Betulaceae | Betula papyrifera | , paper birch | BILLINGS, CAVALIER, DUNN, GRAND FORKS, MCKENZIE, MOUNTRAIL, ROLETTE, WALSH | GFND, NDSU, NPWRC, USDA | Map |
| Betulaceae | Betula pendula | GRAND FORKS, TRAIL | GFND | Map | |
| Betulaceae | Betula pumila | , bog birch | USDA | Map | |
| Betulaceae | Betula sandbergii | USDA | Map | ||
| Compositae | Bidens beckii | GFND | Map | ||
| Compositae | Bidens cernua | , nodding beggartick | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MORTON, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Bidens connata | , purplestem beggarticks | USDA | Map | |
| Compositae | Bidens frondosa | , devil's beggartick | ADAMS, BENSON, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Bidens tripartita | , threelobe beggarticks | BURKE, BURLEIGH, DICKEY, EDDY, EMMONS, GRANT, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RAMSEY, SIOUX, STUTSMAN, WARD, WILLIAMS | DK1995, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Bidens vulgata | , big devils beggartick | BILLINGS, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Boltonia asteroides | , white doll's daisy | BENSON, BURKE, DICKEY, DIVIDE, EDDY, EMMONS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCLEAN, SHERIDAN, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Boltonia latisquama | RANSOM | GFND | Map | |
| Boraginaceae | Borago officinalis | , common borage | GRAND FORKS | GFND, USDA | Map |
| Ophioglossaceae | Botrychium campestre | , Iowa moonwort | USDA | Map | |
| Ophioglossaceae | Botrychium lunaria | , common moonwort | USDA | Map | |
| Ophioglossaceae | Botrychium matricariifolium | , matricary grapefern | USDA | Map | |
| Ophioglossaceae | Botrychium minganense | , Mingan moonwort | BURKE | NDSU, USDA | Map |
| Ophioglossaceae | Botrychium multifidum | , leathery grapefern | USDA | Map | |
| Ophioglossaceae | Botrychium simplex | , little grapefern | USDA | Map | |
| Ophioglossaceae | Botrychium virginianum | , rattlesnake fern | EDDY, GRAND FORKS, RANSOM, RICHLAND, ROLETTE | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Bouteloua curtipendula | , sideoats grama | BILLINGS, BURLEIGH, CASS, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Bouteloua dactyloides | , buffalograss | BILLINGS, BOTTINEAU, BOWMAN, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, OLIVER, SLOPE, STARK, STUTSMAN, WARD, WELLS | DK1995, GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Gramineae | Bouteloua gracilis | , blue grama | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RAMSEY, RANSOM, RENVILLE, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Bouteloua hirsuta | , hairy grama | GRANT, MORTON, RANSOM, RICHLAND | GFND, NDSU, NPWRC, USDA | Map |
| Cruciferae | Brassica arvensis | BOWMAN, GRAND FORKS, MERCER | GFND | Map | |
| Cruciferae | Brassica campestris | EDDY | DK1995 | Map | |
| Cruciferae | Brassica juncea | , India mustard | BILLINGS, CAVALIER, DICKEY, EDDY, EMMONS, GRANT, LAMOURE, LOGAN, MCKENZIE, MORTON, SHERIDAN, STARK, STUTSMAN, WALSH, WILLIAMS | DK1995, GFND, NDSU, USDA | Map |
| Cruciferae | Brassica nigra | , black mustard | GRAND FORKS | GFND, USDA | Map |
| Cruciferae | Brassica rapa | , field mustard | EMMONS | GFND, NDSU, USDA | Map |
| Compositae | Brickellia eupatorioides | , false boneset | BILLINGS, BURLEIGH, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Gramineae | Bromus arvensis | , field brome | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENIZE, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SIOUX, SLOPE, STARK, STUTSMAN, WELLS, WILLIAMS | DK1995, GFND, MSU, NPWRC, NDSU, USDA | Map |
| Gramineae | Bromus briziformis | , rattlesnake brome | KIDDER | NDSU, USDA | Map |
| Gramineae | Bromus catharticus | , rescuegrass | USDA | Map | |
| Gramineae | Bromus ciliatus | , fringed brome | BURKE, DUNN, MCHENRY, RANSOM, WARD | MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Bromus erectus | , erect brome | USDA | Map | |
| Gramineae | Bromus hordeaceus | , soft brome | USDA | Map | |
| Gramineae | Bromus inermis | , smooth brome | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Bromus kalmii | , arctic brome | GRAND FORKS, NELSON, RANSOM, SIOUX | GFND, GFND, USDA | Map |
| Gramineae | Bromus latiglumis | , earlyleaf brome | BENSON, BILLINGS, BURKE, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, MERCER, MOUNTRAIL, OLIVER, STUTSMAN, WARD, WELLS | DK1995, GFND, NDSU, USDA | Map |
| Gramineae | Bromus marginatus | BILLINGS, SLOPE | NDSU | Map | |
| Gramineae | Bromus porteri | , Porter brome | BILLINGS, BURKE, DIVIDE, DUNN, GOLDEN VALLEY, MCKENZIE, MOUNTRAIL, SHERIDAN, WARD, WILLIAMS | NDSU, NPWRC, USDA | Map |
| Gramineae | Bromus pubescens | , hairy woodland brome | USDA | Map | |
| Gramineae | Bromus pumpellianus | PIERCE | GFND | Map | |
| Gramineae | Bromus racemosus | , bald brome | USDA | Map | |
| Gramineae | Bromus squarrosus | , corn brome | KIDDER, MCKENZIE, SHERIDAN, STUTSMAN | NDSU, USDA | Map |
| Gramineae | Bromus tectorum | , cheatgrass | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DUNN, EDDY, EMMONS, GOLDEN VALLEY, HETTINGER, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, RAMSAY, RAMSEY, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Boraginaceae | Buglossoides arvensis | , corn gromwell | MCHENRY | GFND, USDA | Map |
| Butomaceae | Butomus umbellatus | , flowering rush | BARNES | NDSU, USDA | Map |
| Cabombaceae | Cabomba caroliniana | PEMBINA | GFND | Map | |
| Gramineae | Calamagrostis canadensis | , bluejoint | BARNES, BURKE, DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MCINTOSH, MERCER, MOUNTRAIL, RAMSEY, STEELE, STUTSMAN, WALSH, WARD | DK1995, GFND, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Calamagrostis epigeios | , chee reedgrass | USDA | Map | |
| Gramineae | Calamagrostis inexpansa | BILLINGS, BOTTINEAU, GRAND FORKS, MCHENRY, MCKENZIE, NELSON, SARGENT, STUTSMAN, TRAIL, WALSH | GFND, NPWRC | Map | |
| Gramineae | Calamagrostis montanensis | , plains reedgrass | ADAMS, BILLINGS, BURKE, DIVIDE, EMMONS, GOLDEN VALLEY, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MOUNTRAIL, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Calamagrostis neglecta | GRAND FORKS | GFND | Map | |
| Gramineae | Calamagrostis stricta | , slimstem reedgrass | ADAMS, BENSON, BILLINGS, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RANSOM, RICHLAND, SARGENT, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, NDSU, NPWRC, USDA | Map |
| Gramineae | Calamovilfa longifolia | , prairie sandreed | ADAMS, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, NDSU, NDSU, NPWRC, USDA | Map |
| Compositae | Calendula officinalis | CASS | NDSU | Map | |
| Araceae | Calla palustris | , water arum | PEMBINA, ROLETTE | GFND, NPWRC, USDA | Map |
| Malvaceae | Callirhoe involucrata | , purple poppymallow | USDA | Map | |
| Callitrichaceae | Callitriche hermaphroditica | , northern water-starwort | BURKE, CAVALIER, EDDY, GRAND FORKS, RAMSEY, STUTSMAN, WARD | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Callitrichaceae | Callitriche palustris | , vernal water-starwort | BENSON, BILLINGS, EDDY, GRAND FORKS, NELSON, WARD | GFND, DK1995, NPWRC, MSU, USDA | Map |
| Liliaceae | Calochortus gunnisonii | BOWMAN | GFND | Map | |
| Liliaceae | Calochortus nuttallii | , sego lily | BILLINGS, BOWMAN, GOLDEN VALLEY, MCKENZIE, SLOPE | GFND, GFND, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Caltha palustris | , yellow marsh marigold | BENSON, BURLEIGH, DICKEY, EDDY, GRAND FORKS, KIDDER, MERCER, MORTON, OLIVER, RANSOM, RICHLAND, STUTSMAN, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Onagraceae | Calylophus berlandieri | BURLEIGH, DICKEY, DUNN, EMMONS, GOLDEN VALLEY, KIDDER, LAMOURE, MCINTOSH, MERCER, OLIVER, SLOPE, STUTSMAN | NDSU | Map | |
| Onagraceae | Calylophus serrulatus | , yellow sundrops | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Convolvulaceae | Calystegia macounii | , Macoun's false bindweed | RAMSEY | NDSU, USDA | Map |
| Convolvulaceae | Calystegia sepium | , hedge false bindweed | BARNES, BENSON, BENTON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, PEMBINA, RAMSEY, RANSOM, RICHLAND, ROLETTE, SARGENT, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, NDSU, USDA | Map |
| Convolvulaceae | Calystegia silvatica | , shortstalk false bindweed | USDA | Map | |
| Cruciferae | Camelina microcarpa | , littlepod false flax | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Camelina sativa | , gold-of-pleasure | DICKEY, GRANT, RANSOM, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Campanulaceae | Campanula aparinoides | , marsh bellflower | RANSOM | GFND, GFND, USDA | Map |
| Campanulaceae | Campanula glomerata | , Dane's blood | TRAILL | NDSU, USDA | Map |
| Campanulaceae | Campanula rapunculoides | , rampion bellflower | BILLINGS, CASS, DICKEY, EDDY, FOSTER, GOLDEN VALLEY, GRAND FORKS, PEMBINA, RAMSEY, STARK, STUTSMAN, WARD | DK1995, GFND, MSU, NDSU, USDA | Map |
| Campanulaceae | Campanula rotundifolia | , bluebell bellflower | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, PIERCE, RAMSEY, RANSOM, RENVILLE, ROLETTE, SIOUX, SLOPE, STARK, STEELE, STUSMAN, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Bignoniaceae | Campsis radicans | , trumpet creeper | CASS | NDSU, USDA | Map |
| Cannabaceae | Cannabis sativa | , marijuana | RICHLAND | GFND, NPWRC, USDA | Map |
| Cruciferae | Capsella bursa-pastoris | , shepherd's purse | BENSON, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMORE, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, STARK, STUTSMAN, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Caragana arborescens | , Siberian peashrub | BARNES, DICKEY, DIVIDE, EDDY, GRAND FORKS, LAMOURE, MCLEAN, MERCER, STARK, STUTSMAN, WELLS, WILLIAMS | DK1995, GFND, NDSU, USDA | Map |
| Leguminosae | Caragana aurantiaca | , dwarf peashrub | USDA | Map | |
| Leguminosae | Caragana pygmaea | FOSTER, GRAND FORKS | GFND | Map | |
| Cruciferae | Cardamine bulbosa | USDA | Map | ||
| Cruciferae | Cardamine concatenata | , cutleaf toothwort | USDA | Map | |
| Cruciferae | Cardamine pensylvanica | , Pennsylvania bittercress | GRAND FORKS, GRAND FORKS, WALSH | GFND, GFND, USDA | Map |
| Cruciferae | Cardaria chalepensis | , lenspod whitetop | ADAMS, BILLINGS, DICKEY, DUNN, GOLDEN VALLEY, MORTON, MOUNTRAIL, SLOPE, WELLS, WILLIAMS | NDSU, USDA | Map |
| Cruciferae | Cardaria draba | , whitetop | STARK, WILLIAMS | MSU, NPWRC, USDA | Map |
| Cruciferae | Cardaria pubescens | , hairy whitetop | GRAND FORKS, MCKENZIE | GFND, NDSU, USDA | Map |
| Compositae | Carduus acanthoides | , spiny plumeless thistle | USDA | Map | |
| Compositae | Carduus crispus | , curly plumeless thistle | USDA | Map | |
| Compositae | Carduus nutans | , nodding plumeless thistle | BURKE, EDDY, GRAND FORKS, NELSON, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex alopecoidea | , foxtail sedge | RICHLAND, WALSH | GFND, NPWRC, USDA | Map |
| Cyperaceae | Carex aquatilis | , water sedge | BARNES, BURKE, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MOUNTRAIL, RANSOM, STUTSMAN, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex arthrostachya | BURKE | MSU | Map | |
| Cyperaceae | Carex assiniboinensis | , Assiniboia sedge | BILLINGS, BOTTINEAU, EMMONS, KIDDER, MOUNTRAIL, RAMSEY, STUTSMAN, WARD | MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex atherodes | , wheat sedge | BILLINGS, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RAMSEY, RICHLAND, SHERIDAN, STUTSMAN, TOWNER, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex athrostachya | , slenderbeak sedge | DIVIDE, MOUNTRAIL, WILLIAMS | MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex atlantica | EDDY | NDSU | Map | |
| Cyperaceae | Carex aurea | , golden sedge | BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, KIDDER, LAMOURE, MCINTOSH, MOUNTRAIL, RAMSEY, RANSOM, ROLETTE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex backii | , Back's sedge | BURKE | NDSU, USDA | Map |
| Cyperaceae | Carex bebbii | , Bebb's sedge | BENSON, BOTTINEAU, BURKE, EDDY, EMMONS, GRAND FORKS, MOUNTRAIL, RAMSEY, RICHLAND, ROLETTE, STUTSMAN, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex bicknellii | , Bicknell's sedge | BARNED, BARNES, BENSON, BOTTINEAU, CASS, DICKEY, EDDY, GRANT, LAMOURE, MCHENRY, MORTON, PEMBINA, PIERCE, RAMSEY, RANSOM, RENVILLE, RICHLAND, SARGENT, STEELE, STUTSAMN, STUTSMAN, WILLIAMS | NDSU, USDA | Map |
| Cyperaceae | Carex blanda | , eastern woodland sedge | MCLEAN, STUTSMAN | NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex bolanderi | BOTTINEAU, RAMSEY | NDSU | Map | |
| Cyperaceae | Carex brevior | , shortbeak sedge | BILLINGS, BILLLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOORE, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex brunnescens | , brownish sedge | USDA | Map | |
| Cyperaceae | Carex buxbaumii | , Buxbaum's sedge | EDDY, MCHENRY, STUTSMAN | DK1995, GFND, NPWRC, USDA | Map |
| Cyperaceae | Carex capillaris | , hair-like sedge | CAVALIER | GFND, USDA | Map |
| Cyperaceae | Carex chordorrhiza | , creeping sedge | BOTTINEAU | GFND, USDA | Map |
| Cyperaceae | Carex crawei | , Crawe's sedge | BURKE, DIVIDE, EDDY, KIDDER, MCHENRY, MCINTOSH, MOUNTRAIL, RANSOM, STUTSMAN | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex cristatella | , crested sedge | BURLEIGH, EDDY, EMMONS, MCLEAN, MERCER, OLIVER, PEMBINA, RICHLAND, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex davisii | , Davis' sedge | USDA | Map | |
| Cyperaceae | Carex deflexa | , northern sedge | USDA | Map | |
| Cyperaceae | Carex deweyana | , Dewey sedge | BENSON, BURKE, GRAND FORKS, MCKENZIE, MOUNTRAIL, RICHLAND | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex diandra | , lesser panicled sedge | BOTTINEAU, BURKE, ROLETTE | NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex disperma | , softleaf sedge | CAVALIER, GRAND FORKS, MCHENRY, PEMBINA | GFND, USDA | Map |
| Cyperaceae | Carex douglasii | , Douglas' sedge | BILLINGS, BURKE, BURLEIGH, DIVIDE, EMMONS, GRANT, KIDDER, MERCER, MORTON, MOUNTRAIL, RENVILLE, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex duriuscula | , needleleaf sedge | ADAMS, BENSON, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RANSOM, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Cyperaceae | Carex eburnea | , bristleleaf sedge | BILLINGS, GRAND FORKS, RICHLAND | NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex echinata | , star sedge | USDA | Map | |
| Cyperaceae | Carex emoryi | , Emory's sedge | EMMONS, GRAND FORKS, MCLEAN, OLIVER, RANSOM, ROLETTE, WARD | GFND, MSU, NDSU, USDA | Map |
| Cyperaceae | Carex exserta | EDDY, RAMSEY, RICHLAND | NDSU | Map | |
| Cyperaceae | Carex filifolia | , threadleaf sedge | BILLINGS, BOWMAN, BURKE, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex formosa | , handsome sedge | USDA | Map | |
| Cyperaceae | Carex garberi | , elk sedge | BURKE, MCHENRY, MOUNTRAIL | GFND, MSU, NDSU, USDA | Map |
| Cyperaceae | Carex gracillima | , graceful sedge | RICHLAND | NDSU, USDA | Map |
| Cyperaceae | Carex granularis | , limestone meadow sedge | BURLEIGH, DUNN, EDDY, GRAND FORKS, GRANT, KIDDER, RANSOM, RICHLAND, SARGENT, STUTSMAN, WALSH | GFND, DK1995, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex gravida | , heavy sedge | BILLINGS, BURKE, BURLEIGH, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, MCKENZIE, MCLEAN, MERCER, MORTON, MORTON OR SIOUX, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex gynocrates | , northern bog sedge | WILLIAMS | MSU, USDA | Map |
| Cyperaceae | Carex hallii | , deer sedge | BURKE, DIVIDE, EDDY, EMMONS, GRAVIDA, KIDDER, LAMOURE, LOGAN, MOUNTRAIL, RICHLAND, SARGENT, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex haydenii | , Hayden's sedge | USDA | Map | |
| Cyperaceae | Carex heliophila | EDDY, SLOPE, WARD | DK1995, GFND, GFND | Map | |
| Cyperaceae | Carex hookerana | BURKE, MOUNTRAIL, WILLIAMS | MSU, NDSU, USDA | Map | |
| Cyperaceae | Carex houghtonii | GFND | Map | ||
| Cyperaceae | Carex hystericina | , bottlebrush sedge | EDDY, EMMONS, GRAND FORKS, GRANT, HETTINGER, KIDDER, LOGAN, MCINTOSH, MERCER, RANSOM, RICHLAND, SARGENT, STUTSMAN, WALSH, WARD | DK1995, GFND, GFND, MSU, NPWRC, NDSU, USDA | Map |
| Cyperaceae | Carex inops | , long-stolon sedge | BOWMAN, BURKE, CAVALIER, DUNN, EMMONS, KIDDER, MCINTOSH, MCLEAN, MERCER, MOUNTRAIL, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Cyperaceae | Carex interior | , inland sedge | BURKE, DIVIDE, EDDY, EMMONS, KIDDER, MCHENRY, MOUNTRAIL, PIERCE, RICHLAND, STUTSMAN, WELLS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex lacustris | , hairy sedge | BENSON, EDDY, LAMOURE, RANSOM, ROLETTE, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex laeviconica | , smoothcone sedge | BENSON, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex lasiocarpa | , woollyfruit sedge | BARNES, BOTTINEAU, GRAND FORKS, MCHENRY, RANSOM | GFND, NDSU, USDA | Map |
| Cyperaceae | Carex laxiflora | RICHLAND | GFND | Map | |
| Cyperaceae | Carex leptalea | , bristlystalked sedge | CAVALIER, MCHENRY, PEMBINA | GFND, NPWRC, USDA | Map |
| Cyperaceae | Carex limosa | , mud sedge | BOTTINEAU, MCHENRY | GFND, NPWRC, USDA | Map |
| Cyperaceae | Carex longirostris | STUTSMAN | GFND | Map | |
| Cyperaceae | Carex mackenziei | GRAND FORKS | GFND | Map | |
| Cyperaceae | Carex marcida | BENSON, STUTSMAN | GFND | Map | |
| Cyperaceae | Carex meadii | , Mead's sedge | DICKEY, EDDY, KIDDER, MCLEAN | DK1995, NDSU, USDA | Map |
| Cyperaceae | Carex molesta | , troublesome sedge | MCLEAN, WARD | MSU, NDSU, USDA | Map |
| Cyperaceae | Carex nebrascensis | , Nebraska sedge | USDA | Map | |
| Cyperaceae | Carex nebraskensis | EMMONS, SLOPE | NDSU | Map | |
| Cyperaceae | Carex nigromarginata | WALSH | GFND | Map | |
| Cyperaceae | Carex normalis | MERCER | GFND | Map | |
| Cyperaceae | Carex obtusa | BILLINGS, WARD | NDSU | Map | |
| Cyperaceae | Carex obtusata | , obtuse sedge | BILLINGS, BURKE, DIVIDE, EDDY, EMMONS, KIDDER, MORTON, MOUNTRAIL, RANSOM, SHERIDAN, STUTSMAN, WARD, WILLIAMS | DK1995, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex occidentalis | BENSON | GFND | Map | |
| Cyperaceae | Carex parryana | , Parry's sedge | BENSON, BURKE, MOUNTRAIL, WARD | GFND, MSU, USDA | Map |
| Cyperaceae | Carex peckii | , Peck's sedge | BURKE, DUNN, GRAND FORKS, MCLEAN, MERCER, MOUNTRAIL, RICHLAND, STUTSMAN, WALSH, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex pedunculata | , longstalk sedge | USDA | Map | |
| Cyperaceae | Carex pellita | , woolly sedge | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, RANSOM, RENVILLE, RICHLAND, ROLETTE, SARGENT, SHERIDAN, SLOPE, STARK, STEELE, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, NDSU, USDA | Map |
| Cyperaceae | Carex pensylvanica | , Pennsylvania sedge | BARNES, BURKE, EDDY, EMMONS, GRAND FORKS, MOUNTRAIL, RAMSEY, RANSOM, STUTSMAN, WALSH, WARD, WILLLIAMS | GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex praegracilis | , clustered field sedge | ADAMS, BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, RANSOM, RICHLAND, ROLETTE, SARGENT, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex prairea | , prairie sedge | EDDY, GRAND FORKS, KIDDER, MCHENRY, MOUNTRAIL, SHERIDAN, STUTSMAN | DK1995, GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Cyperaceae | Carex praticola | , meadow sedge | BENSON, DUNN, MOUNTRAIL | GFND, MSU, NDSU, USDA | Map |
| Cyperaceae | Carex pseudocyperus | , cypress-like sedge | BENSON, BOTTINEAU, EDDY, GRAND FORKS, KIDDER, MCHENRY, PEMBINA, ROLETTE | GFND, DK1995, GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Cyperaceae | Carex radiata | , eastern star sedge | USDA | Map | |
| Cyperaceae | Carex retrorsa | , knotsheath sedge | BOTTINEAU, BURLEIGH, DIVIDE, GRAND FORKS, RICHLAND, ROLETTE, STUTSMAN, WALSH | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex richardsonii | , Richardson's sedge | USDA | Map | |
| Cyperaceae | Carex rivularis | GRAND FORKS | GFND | Map | |
| Cyperaceae | Carex rosea | , rosy sedge | EDDY, GRAND FORKS, RICHLAND, SARGENT, WALSH | GFND, GFND, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex rossii | , Ross' sedge | DUNN, MCLEAN, MERCER, OLIVER, SLOPE, STUTSMAN, WILLIAMS | MSU, NDSU, USDA | Map |
| Cyperaceae | Carex rostrata | BOTTINEAU, DIVIDE, DUNN, EDDY, GRAND FORKS, KIDDER, MCHENRY, MOUNTRAIL, ROLETTE, STUTSMAN, TOWNER, WALSH, WARD | DK1995, GFND, NDSU, NPWRC | Map | |
| Cyperaceae | Carex sartwellii | , Sartwell's sedge | BENSON, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, GRAND FORKS, KIDDER, MCINTOSH, MCLEAN, MERCER, MOUNTRAIL, RANSOM, STUTSMAN, TOWNER, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex saximontana | , Rocky Mountain sedge | BURKE, BURLEIGH, DUNN, EMMONS, GRAND FORKS, KIDDER, LOGAN, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SLOPE, STARK, STUTSMAN, WALSH, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Cyperaceae | Carex scirpiformis | DUNN | NDSU | Map | |
| Cyperaceae | Carex scirpoidea | , northern singlespike sedge | BURKE | NDSU, USDA | Map |
| Cyperaceae | Carex scoparia | , broom sedge | GRAND FORKS, STUTSMAN | GFND, NDSU, USDA | Map |
| Cyperaceae | Carex siccata | , dryspike sedge | BURKE, DIVIDE, DUNN, EDDY, MOUNTRAIL, STUTSMAN, WARD | NDSU, MSU, NDSU, USDA | Map |
| Cyperaceae | Carex simulata | , analogue sedge | BURKE, MCHENRY | GFND, USDA | Map |
| Cyperaceae | Carex sprengelii | , Sprengel's sedge | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex sterilis | , dioecious sedge | MCHENRY | GFND, NPWRC, USDA | Map |
| Cyperaceae | Carex stipata | , awlfruit sedge | BENSON, EDDY, GRAND FORKS, RANSOM, RICHLAND, ROLETTE, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex straminea | BENSON, STUTSMAN | GFND | Map | |
| Cyperaceae | Carex stricta | , upright sedge | BURLEIGH, DIVIDE, EDDY, EMMONS, MCKENZIE, MCLEAN, MERCER, MORTON, OLIVER, STARK, STUTSMAN, WALSH, WARD | DK1995, GFND, NDSU, USDA | Map |
| Cyperaceae | Carex sychnocephala | , manyhead sedge | BOWMAN, BURKE, EDDY, EMMONS, MERCER, MOUNTRAIL, RANSOM, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, USDA | Map |
| Cyperaceae | Carex tenera | , quill sedge | BILLINGS, BOTTINEAU, BURKE, DIVIDE, EDDY, EMMONS, GRAND FORKS, LAMOURE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RICHLAND, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, USDA | Map |
| Cyperaceae | Carex tetanica | , rigid sedge | BENSON, BURKE, DIVIDE, EDDY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MOUNTRAIL, RICHLAND, SHERIDAN, STUTSMAN | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex torreyi | , Torrey's sedge | BENSON, BURKE, DUNN, EMMONS, GRAND FORKS, MCKENZIE, MERCER, MOUNTRAIL, OLIVER, WARD | GFND, MSU, NDSU, USDA | Map |
| Cyperaceae | Carex umbellata | RICHLAND | GFND | Map | |
| Cyperaceae | Carex utriculata | , Northwest Territory sedge | BURKE | GFND, MSU, USDA | Map |
| Cyperaceae | Carex vesicaria | , blister sedge | USDA | Map | |
| Cyperaceae | Carex viridula | , little green sedge | BURKE, EDDY, KIDDER, LOGAN, MERCER, MOUNTRAIL, RICHLAND, STUTSMAN | DK1995, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex vulpinoidea | , fox sedge | BARNES, BENSON, BILLINGS, BURKE, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Carex xerantica | , whitescale sedge | BILLINGS, BURKE, DIVIDE, EDDY, EMMONS, MOUNTRAIL, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Carthamus tinctorius | , safflower | SLOPE, STARK | NDSU, USDA | Map |
| Umbelliferae | Carum carvi | , caraway | MOUNTRAIL, STUTSMAN | NDSU, USDA | Map |
| Juglandaceae | Carya ovata | , shagbark hickory | USDA | Map | |
| Orobanchaceae | Castilleja coccinea | RAMSEY | GFND | Map | |
| Orobanchaceae | Castilleja miniata | , giant red Indian paintbrush | USDA | Map | |
| Orobanchaceae | Castilleja sessiliflora | , downy paintedcup | BENSON, BILLINGS, BOWMAN, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, SHERIDAN, SIOUX, SLOPE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Catabrosa aquatica | , water whorlgrass | BENSON, DICKEY, DUNN, EDDY, GRAND FORKS, KIDDER, MCHENRY, MERCER, MOUNTRAIL, SLOPE, STUTSMAN, WILLIAMS | DK1995, GFND, NDSU, USDA | Map |
| Bignoniaceae | Catalpa bignonioides | , southern catalpa | CASS | NDSU, USDA | Map |
| Bignoniaceae | Catalpa speciosa | , northern catalpa | USDA | Map | |
| Berberidaceae | Caulophyllum thalictroides | , blue cohosh | USDA | Map | |
| Rhamnaceae | Ceanothus herbaceus | , Jersey tea | USDA | Map | |
| Celastraceae | Celastrus scandens | , American bittersweet | BILLINGS, BURLEIGH, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, RAMSEY, RANSOM, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cannabaceae | Celtis occidentalis | , common hackberry | DICKEY, EDDY, EMMONS, KIDDER, LOGAN, MCLEAN, MERCER, MORTON, STUTSMAN, WARD, WELLS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Cenchrus longispinus | , mat sandbur | BOWMAN, BURLEIGH, EMMONS, GRANT, MORTON, RICHLAND, SIOUX, STARK, STUTSMAN | GFND, NDSU, NPWRC, USDA | Map |
| Compositae | Centaurea cineraria | CASS | NDSU | Map | |
| Compositae | Centaurea cyanus | , garden cornflower | CASS | NDSU, USDA | Map |
| Compositae | Centaurea orientalis | GRAND FORKS | NDSU | Map | |
| Compositae | Centaurea scabiosa | , greater knapweed | GOLDEN VALLEY | NDSU, USDA | Map |
| Compositae | Centaurea solstitialis | , yellow star-thistle | GFND, USDA | Map | |
| Compositae | Centaurea stoebe | , spotted knapweed | KIDDER, STUTSMAN | NDSU, NPWRC, NDSU, USDA | Map |
| Caryophyllaceae | Cerastium arvense | , field chickweed | BENSON, BILLIGS, BILLINGS, BURKE, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MCHENRY, MCINSTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Caryophyllaceae | Cerastium brachypodum | , shortstalk chickweed | BILLINGS, BURKE, DUNN, EDDY, EMMONS, KIDDER, LOGAN, MCINTOSH, MCLEAN, MORTON, MOUNTRAIL, OLIVER, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Caryophyllaceae | Cerastium fontanum | , common mouse-ear chickweed | DUNN, WILLIAMS | NDSU, USDA | Map |
| Caryophyllaceae | Cerastium nutans | , nodding chickweed | BURKE, GRAND FORKS, WALSH | GFND, MSU, USDA | Map |
| Caryophyllaceae | Cerastium vulgatum | RANSOM | GFND | Map | |
| Ranunculaceae | Ceratocephala testiculata | , curveseed butterwort | BILLINGS | NDSU, USDA | Map |
| Ceratophyllaceae | Ceratophyllum demersum | , coon's tail | BARNES, BENSON, BILLINGS, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, SLOPE, STUTSMAN, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Chaenactis douglasii | , Douglas' dustymaiden | GOLDEN VALLEY | GFND, USDA | Map |
| Plantaginaceae | Chaenorhinum minus | , dwarf snapdragon | USDA | Map | |
| Rosaceae | Chamaerhodos erecta | , little rose | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Euphorbiaceae | Chamaesyce geyeri | , Geyer's sandmat | BILLINGS, MERCER, RANSOM, RICHLAND, WARD | GFND, NPWRC, MSU, USDA | Map |
| Euphorbiaceae | Chamaesyce glyptosperma | , ribseed sandmat | BURKE, EDDY, MOUNTRAIL, RANSOM, RICHLAND, STUTSMAN, WALSH, WARD | DK1995, GFND, NPWRC, MSU, USDA | Map |
| Euphorbiaceae | Chamaesyce maculata | , spotted sandmat | USDA | Map | |
| Euphorbiaceae | Chamaesyce missurica | , prairie sandmat | USDA | Map | |
| Euphorbiaceae | Chamaesyce nutans | , eyebane | USDA | Map | |
| Euphorbiaceae | Chamaesyce serpens | , matted sandmat | USDA | Map | |
| Euphorbiaceae | Chamaesyce serpyllifolia | , thymeleaf sandmat | BENSON, BILLINGS, BURKE, CAVALIER, MCKENZIE, RICHLAND, STUTSMAN, WARD | GFND, NPWRC, MSU, USDA | Map |
| Euphorbiaceae | Chamaesyce stictospora | , slimseed sandmat | MCKENZIE | NDSU, USDA | Map |
| Onagraceae | Chamerion angustifolium | , fireweed | BURKE, BURLEIGH, DIVIDE, LAMOURE, MERCER, MOUNTRAIL, WILLIAMS | MSU, NDSU, USDA | Map |
| Polypodiaceae | Cheilanthes feei | , slender lipfern | USDA | Map | |
| Cruciferae | Cheiranthus cheiranthoides | BENSON | GFND | Map | |
| Cruciferae | Cheiranthus syrticola | BENSON | GFND | Map | |
| Amaranthaceae | Chenopodium album | , lambsquarters | BENSON, BURLEIGH, DICKEY, DIVIDE, EMMONS, GRAND FORKS, LOGAN, MCINTOSH, MCLEAN, MERCER, MOUNTRAIL, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Amaranthaceae | Chenopodium atrovirens | , pinyon goosefoot | USDA | Map | |
| Amaranthaceae | Chenopodium berlandieri | , pitseed goosefoot | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, KIDDER, MCINTOSH, MCKENZIE, MERCER, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAB, STUTSMAN, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Amaranthaceae | Chenopodium botrys | , Jerusalem oak goosefoot | USDA | Map | |
| Amaranthaceae | Chenopodium capitatum | , blite goosefoot | GRAND FORKS | GFND, USDA | Map |
| Amaranthaceae | Chenopodium chenopodioides | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, EMMONS, GOLDEN VALLEY, KIDDER, LOGAN, MCINTOSH, MOUNTRAIL, STUTSMAN, WARD, WELLS, WILLIAMS | NDSU | Map | |
| Amaranthaceae | Chenopodium desiccatum | BILLINGS, BURKE, BURLEIGH, DICKEY, DUNN, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCLEAN, MOUNTRAIL, OLIVER, SLOPE, STUTSMAN, WELLS, WILLIAMS | NDSU | Map | |
| Amaranthaceae | Chenopodium foliosum | , leafy goosefoot | GRAND FORKS | GFND, USDA | Map |
| Amaranthaceae | Chenopodium fremontii | , Fremont's goosefoot | BENSON, BILLINGS, BOWMAN, DIVIDE, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCKENZIE, MOUNTRAIL, SHERIDAN/WELLS, STARK, STUTSMAN, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Amaranthaceae | Chenopodium glaucum | , oakleaf goosefoot | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MOUNTRAIL, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Amaranthaceae | Chenopodium humile | , marshland goosefoot | USDA | Map | |
| Amaranthaceae | Chenopodium leptophyllum | BURKE, GRAND FORKS, MCHENRY, MOUNTRAIL, WALSH, WARD, WILLIAMS | GFND, MSU, NPWRC | Map | |
| Amaranthaceae | Chenopodium pratericola | , desert goosefoot | EDDY | DK1995, USDA | Map |
| Amaranthaceae | Chenopodium rubrum | , red goosefoot | CAVALIER, EDDY, MOUNTRAIL, STUTSMAN, TRAILL, WARD | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Amaranthaceae | Chenopodium salinum | , Rocky Mountain goosefoot | USDA | Map | |
| Amaranthaceae | Chenopodium simplex | , mapleleaf goosefoot | BOTTINEAU, BURKE, EDDY, GRAND FORKS, MOUNTRAIL, RANSOM, STUTSMAN, WALSH, WARD | DK1995, GFND, NPWRC, MSU, USDA | Map |
| Amaranthaceae | Chenopodium standleyanum | , Standley's goosefoot | BURLEIGH, DICKEY, EMMONS, GRANT, KIDDER, LAMOURE, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SIOUX, STUTSMAN, WARD, WILLIAMS | GFND, NDSU, USDA | Map |
| Amaranthaceae | Chenopodium strictum | EDDY, WELLS | DK1995, NDSU | Map | |
| Amaranthaceae | Chenopodium subglabrum | , smooth goosefoot | BILLINGS, SLOPE | GFND, NDSU, USDA | Map |
| Gramineae | Chloris virgata | , feather fingergrass | BURLEIGH, MORTON | NDSU, USDA | Map |
| Cruciferae | Chorispora tenella | , crossflower | EMMONS, MCKENZIE, WILLIAMS | GFND, NDSU, USDA | Map |
| Compositae | Chrysopsis villosa | BARNES, BENSON, BILLINGS, BOTTINEAU, CASS/RICHLAND, DIVIDE, EDDY, GRAND FORKS, MCHENRY, MCLEAN, MERCER, NELSON, RAMSEY, RANSOM, RICHLAND, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC | Map | |
| Compositae | Chrysothamnus graveolens | BILLINGS, GOLDEN VALLEY, MCKENZIE, OLIVER, SLOPE | GFND | Map | |
| Compositae | Chrysothamnus nauseosus | BOWMAN, DIVIDE, EMMONS, MCKENZIE, MERCER, MOUNTRAIL | GFND, NPWRC | Map | |
| Compositae | Cichorium intybus | , chicory | BENSON, CASS, WILLIAMS | GFND, NDSU, MSU, USDA | Map |
| Umbelliferae | Cicuta bulbifera | , bulblet-bearing water hemlock | EDDY, KIDDER, RICHLAND | DK1995, NDSU, NPWRC, USDA | Map |
| Umbelliferae | Cicuta douglasii | DUNN, MCKENZIE, STARK | NDSU | Map | |
| Umbelliferae | Cicuta maculata | , spotted water hemlock | BILLINGS, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Umbelliferae | Cicuta occidentalis | BENSON | GFND | Map | |
| Gramineae | Cinna arundinacea | , sweet woodreed | USDA | Map | |
| Gramineae | Cinna latifolia | , drooping woodreed | EDDY, OLIVER, WALSH | DK1995, GFND, GFND, NDSU, USDA | Map |
| Onagraceae | Circaea alpina | , small enchanter's nightshade | USDA | Map | |
| Onagraceae | Circaea lutetiana | , broadleaf enchanter's nightshade | DICKEY, EDDY, MORTON, OLIVER, RICHLAND | DK1995, NDSU, NPWRC, USDA | Map |
| Onagraceae | Circaea quadrisulcata | GRAND FORKS, WALSH | GFND, GFND | Map | |
| Compositae | Cirsium altissimum | , tall thistle | BENSON, CASS, GRAND FORKS, MORTON | GFND, GFND, NDSU, USDA | Map |
| Compositae | Cirsium arvense | , Canada thistle | BARNES, BENSON, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MERCER, MOUNTRAIL, RAMSEY, RANSOM, RICHLAND, ROLETTE, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Cirsium canescens | , prairie thistle | GRAND FORKS | GFND, USDA | Map |
| Compositae | Cirsium discolor | , field thistle | BOWMAN | GFND, USDA | Map |
| Compositae | Cirsium flodmanii | , Flodman's thistle | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, SHERDAIN, SIOUX, SLOPE, STARK, STEELE, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Cirsium muticum | , swamp thistle | GRAND FORKS | GFND, NDSU, USDA | Map |
| Compositae | Cirsium pumilum | NDSU | Map | ||
| Compositae | Cirsium undulatum | , wavyleaf thistle | BILLINGS, BOWMAN, BURKE, BURLEIGH, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Cirsium vulgare | , bull thistle | CASS, GRAND FORKS, LAMOURE, MCLEAN, RANSOM, SLOPE, STUTSMAN, WARD, WILLIAMS | GFND, GFND, MSU, NDSU, USDA | Map |
| Cucurbitaceae | Citrullus vulgaris | CASS | NDSU | Map | |
| Ranunculaceae | Clematis columbiana | , rock clematis | DUNN | GFND, NDSU, USDA | Map |
| Ranunculaceae | Clematis ligusticifolia | , western white clematis | BILLINGS, BURLEIGH, EMMONS, GOLDEN VALLEY, GRANT, MCKENZIE, MCLEAN, MERCER, MORTON, OLIVER, SLOPE, STARK, WILLIAMS | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Clematis occidentalis | DUNN | NDSU | Map | |
| Ranunculaceae | Clematis tangutica | BURLEIGH | NDSU | Map | |
| Ranunculaceae | Clematis virginiana | , devil's darning needles | BURLEIGH, GRAND FORKS, RICHLAND, WALSH | GFND, GFND, NPWRC, USDA | Map |
| Cruciferae | Cleome serrulata | , Rocky Mountain beeplant | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, PIERCE, RANSOM, RICHLAND, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, NDSU, MSU, NPWRC, USDA | Map |
| Plantaginaceae | Collinsia parviflora | , maiden blue eyed Mary | DUNN, SLOPE | GFND, NDSU, NDSU, USDA | Map |
| Polemoniaceae | Collomia linearis | , tiny trumpet | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, NELSON, OLIVER, PEMBINA, PIERCE, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STEELE, STUTSMAN, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Santalaceae | Comandra umbellata | , bastard toadflax | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Comarum palustre | , purple marshlocks | BOTTINEAU, GRAND FORKS, MCHENRY | GFND, NPWRC, USDA | Map |
| Commelinaceae | Commelina communis | , Asiatic dayflower | CASS | NDSU, USDA | Map |
| Umbelliferae | Conium maculatum | , poison hemlock | USDA | Map | |
| Cruciferae | Conringia orientalis | , hare's ear mustard | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, EDDY, GOLDEN VALLEY, GRAND FORKS, MCHENRY, MCKENZIE, MORTON, MOUNTRAIL, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Consolida ajacis | , doubtful knight's-spur | BILLINGS, MCINTOSH, STARK, WILLIAMS | NDSU, USDA | Map |
| Ranunculaceae | Consolida pubescens | , hairy knight's-spur | USDA | Map | |
| Convolvulaceae | Convolvulus arvensis | , field bindweed | ADAMS, BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, OLIVER, PIERCE, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Conyza canadensis | , Canadian horseweed | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Conyza ramosissima | , dwarf horseweed | GRANT | NDSU, USDA | Map |
| Orchidaceae | Corallorhiza maculata | , summer coralroot | DUNN, GRAND FORKS, ROLETTE, STARK | GFND, NDSU, NPWRC, USDA | Map |
| Orchidaceae | Corallorhiza striata | , hooded coralroot | STARK | NDSU, USDA | Map |
| Orchidaceae | Corallorhiza trifida | , yellow coralroot | ROLETTE | NPWRC, USDA | Map |
| Compositae | Coreopsis atkinsoniana | BOWMAN | NDSU | Map | |
| Compositae | Coreopsis tinctoria | , golden tickseed | ADAMS, BOWMAN, DIVIDE, GOLDEN VALLEY, GRANT, HETTINGER, SLOPE | NDSU, MSU, NDSU, USDA | Map |
| Umbelliferae | Coriandrum sativum | , coriander | USDA | Map | |
| Amaranthaceae | Corispermum americanum | , American bugseed | BILLINGS, BURLEIGH, DUNN, GRANT, MERCER, MORTON, STARK, WILLIAMS | NDSU, USDA | Map |
| Amaranthaceae | Corispermum pallasii | , Siberian bugseed | USDA | Map | |
| Amaranthaceae | Corispermum villosum | , hairy bugseed | USDA | Map | |
| Cornaceae | Cornus canadensis | , bunchberry dogwood | USDA | Map | |
| Cornaceae | Cornus obliqua | , silky dogwood | USDA | Map | |
| Cornaceae | Cornus racemosa | , gray dogwood | RANSOM | GFND, USDA | Map |
| Cornaceae | Cornus rugosa | , roundleaf dogwood | USDA | Map | |
| Cornaceae | Cornus sericea | , redosier dogwood | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SIOUX, SLOPE, STARK, STUTSMAN, WILLIAMS | NDSU, USDA | Map |
| Cornaceae | Cornus stolonifera | BENSON, BILLINGS, BURKE, BURLEIGH, CAVALIER, EDDY, GRAND FORKS, MCHENRY, RANSOM, RICHLAND, ROLETTE, SLOPE, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NPWRC | Map | |
| Leguminosae | Coronilla varia | FOSTER, GRAND FORKS | GFND, GFND | Map | |
| Papaveraceae | Corydalis aurea | , scrambled eggs | BENSON, BOTTINEAU, BURKE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, LOGAN, MOUNTRAIL, STUTSMAN, WALSH, WARD, WELLS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Betulaceae | Corylus americana | , American hazelnut | BURKE, DUNN, EDDY, EMMONS, GRAND FORKS, GRIGGS, MCLEAN, MORTON, MOUNTRAIL, WALSH, WARD, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Betulaceae | Corylus cornuta | , beaked hazelnut | BOTTINEAU, GRAND FORKS, PEMBINA, ROLETTE, ROLLETTE, SLOPE, WALSH | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Cotoneaster vulgaris | GRAND FORKS | GFND | Map | |
| Rosaceae | Crataegus chrysocarpa | , fireberry hawthorn | BENSON, BILLINGS, BURLEIGH, DIVIDE, DUNN, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCINTSOH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PEMBINA, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Crataegus douglasii | , black hawthorn | USDA | Map | |
| Rosaceae | Crataegus mollis | , downy hawthorn | GRAND FORKS, RANSOM, WARD | GFND, MSU, USDA | Map |
| Rosaceae | Crataegus pruinosa | GRAND FORKS | GFND | Map | |
| Rosaceae | Crataegus rotundifolia | BILLINGS, EDDY, GRAND FORKS, MCHENRY, MERCER, ROLETTE, SLOPE | DK1995, GFND, GFND | Map | |
| Rosaceae | Crataegus succulenta | , fleshy hawthorn | DUNN, KIDDER, RANSOM | GFND, MSU, NDSU, USDA | Map |
| Compositae | Crepis capillaris | , smooth hawksbeard | USDA | Map | |
| Compositae | Crepis occidentalis | , largeflower hawksbeard | BILLINGS, BOWMAN, MCKENZIE, MOUNTRAIL, SLOPE, STARK, WILLIAMS | NDSU, USDA | Map |
| Compositae | Crepis runcinata | , fiddleleaf hawksbeard | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Crepis tectorum | , narrowleaf hawksbeard | CASS, CAVALIER, LAMOURE, MOUNTRAIL, PEMBINA, STARK, STUTSMAN | NDSU, NPWRC, USDA | Map |
| Iridaceae | Crocus biflorus | GRAND FORKS | GFND | Map | |
| Boraginaceae | Cryptantha celosioides | , buttecandle | BILLINGS, BOWMAN, DUNN, GRANT, MCHENRY, MERCER, MOUNTRAIL, SIOUX, SLOPE, WARD, WILLIAMS | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Boraginaceae | Cryptantha minima | SLOPE | NDSU | Map | |
| Boraginaceae | Cryptantha torreyana | , Torrey's cryptantha | SIOUX | GFND, USDA | Map |
| Boraginaceae | Cryptantha virgata | STARK | GFND | Map | |
| Umbelliferae | Cryptotaenia canadensis | , Canadian honewort | GRAND FORKS, RANSOM, RICHLAND, WALSH | GFND, NPWRC, USDA | Map |
| Cucurbitaceae | Cucumis melo | CASS | NDSU | Map | |
| Cucurbitaceae | Cucurbita maxima | CASS | NDSU | Map | |
| Cucurbitaceae | Cucurbita pepo | CASS | NDSU | Map | |
| Convolvulaceae | Cuscuta approximata | , alfalfa dodder | BOWMAN | NDSU, USDA | Map |
| Convolvulaceae | Cuscuta arvensis | RANSOM | GFND | Map | |
| Convolvulaceae | Cuscuta campestris | CASS, RANSOM | GFND, NDSU | Map | |
| Convolvulaceae | Cuscuta cephalanthi | , buttonbush dodder | MCHENRY, MCINTOSH, RANSOM | NDSU, NDSU, USDA | Map |
| Convolvulaceae | Cuscuta coryli | , hazel dodder | BARNES, BOTTINEAU, CASS, LOGAN, MCKENZIE, RANSOM, RICHLAND, WARD | NDSU, USDA | Map |
| Convolvulaceae | Cuscuta cuspidata | , cusp dodder | MCHENRY | NDSU, USDA | Map |
| Convolvulaceae | Cuscuta epithymum | , clover dodder | STUTSMAN | NDSU, USDA | Map |
| Convolvulaceae | Cuscuta glomerata | , rope dodder | USDA | Map | |
| Convolvulaceae | Cuscuta gronovii | , scaldweed | BARNES, BOTTINEAU, BURKE, CASS, MCHENRY, MCKENZIE, MCLEAN, PEMBINA, RANSOM, RICHLAND, STUTSMAN, WALSH, WARD | GFND, NPWRC, MSU, NDSU, USDA | Map |
| Convolvulaceae | Cuscuta indecora | , bigseed alfalfa dodder | BARNES, BENSON, DUNN, EMMONS, GRANT, KIDDER, MCHENRY, MCINTOSH | NDSU, USDA | Map |
| Convolvulaceae | Cuscuta megalocarpa | , bigfruit dodder | USDA | Map | |
| Convolvulaceae | Cuscuta pentagona | , fiveangled dodder | ADAMS, BARNES, CASS, GRAND FORKS, LOGAN, MCINTOSH, MCLEAN, PIERCE, RANSOM, RICHLAND, SARGENT, STARK | MSU, NDSU, USDA | Map |
| Convolvulaceae | Cuscuta polygonorum | , smartweed dodder | EMMONS | NDSU, USDA | Map |
| Compositae | Cyclachaena xanthifolia | , giant sumpweed | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, RAMSEY, RANSOM, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, NDSU, USDA | Map |
| Amaranthaceae | Cycloloma atriplicifolium | , winged pigweed | KIDDER, MERCER | NDSU, USDA | Map |
| Umbelliferae | Cymopterus acaulis | , plains springparsley | BARNES, BILLINGS, BOWMAN, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LOGAN, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Boraginaceae | Cynoglossum boreale | BOTTINEAU, DUNN, ROLETTE | GFND, NDSU, NPWRC | Map | |
| Boraginaceae | Cynoglossum officinale | , gypsyflower | ADAMS, BARNES, CASS, EDDY, GRAND FORKS, KIDDER, MCHENRY, MCKENZIE, RAMSEY, RANSOM, STEELE | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Boraginaceae | Cynoglossum virginianum | , wild comfrey | BOTTINEAU, DUNN, ROLETTE | NDSU, USDA | Map |
| Cyperaceae | Cyperus acuminatus | , tapertip flatsedge | BENSON, STUTSMAN | GFND, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Cyperus bipartitus | , slender flatsedge | USDA | Map | |
| Cyperaceae | Cyperus diandrus | , umbrella flatsedge | USDA | Map | |
| Cyperaceae | Cyperus erythorohizos | OLIVER | GFND | Map | |
| Cyperaceae | Cyperus erythrorhizos | , redroot flatsedge | BURLEIGH, DICKEY, EMMONS, LAMOURE, STUTSMAN | NDSU, NPWRC, USDA | Map |
| Cyperaceae | Cyperus esculentus | , yellow nutsedge | CASS, EDDY | DK1995, NDSU, USDA | Map |
| Cyperaceae | Cyperus odoratus | , fragrant flatsedge | SARGENT, STUTSMAN | GFND, NPWRC, NDSU, USDA | Map |
| Cyperaceae | Cyperus schweinitzii | , Schweinitz's flatsedge | EDDY, EMMONS, GRANT, KIDDER, MCHENRY, MERCER, MORTON, RICHLAND, WILLIAMS | DK1995, GFND, GFND, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Cyperus squarrosus | , bearded flatsedge | BILLINGS, BURKE, GRANT, KIDDER, MCLEAN, MORTON, SARGENT, STUTSMAN, WARD, WILLIAMS | NPWRC, MSU, NDSU, USDA | Map |
| Orchidaceae | Cypripedium andrewsii | NELSON | NPWRC, USDA | Map | |
| Orchidaceae | Cypripedium calceolus | EDDY, GRAND FORKS, MCHENRY, RANSOM, ROLETTE, SARGENT, STUTSMAN | DK1995, GFND, NPWRC | Map | |
| Orchidaceae | Cypripedium candidum | , white lady's slipper | DICKEY, EDDY, NELSON, RANSOM, RICHLAND | DK1995, NDSU, NPWRC, USDA | Map |
| Orchidaceae | Cypripedium parviflorum | , lesser yellow lady's slipper | DUNN, ROLETTE, STUTSMAN | GFND, NDSU, USDA | Map |
| Orchidaceae | Cypripedium pubescens | GRAND FORKS | GFND | Map | |
| Orchidaceae | Cypripedium reginae | , showy lady's slipper | CAVALIER | GFND, USDA | Map |
| Polypodiaceae | Cystopteris fragilis | , brittle bladderfern | BURKE, DUNN, EDDY, RANSOM, RICHLAND, SARGENT, STUTSMAN, WARD | DK1995, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Dactylis glomerata | , orchardgrass | MERCER, OLIVER | GFND, USDA | Map |
| Orchidaceae | Dactylorhiza viridis | BENSON, BURKE, BURLEIGH, EDDY, GRAND FORKS, MCLEAN, MORTON, OLIVER, ROLETTE | DK1995, GFND, NDSU, NPWRC, MSU, USDA | Map | |
| Compositae | Dahlia pinnata | CASS | NDSU | Map | |
| Leguminosae | Dalea candida | , white prairie clover | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, KIDDER, LOGAN, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, RAMSEY, SLOPE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, USDA | Map |
| Leguminosae | Dalea enneandra | , nineanther prairie clover | BILLINGS, MORTON | GFND, NPWRC, USDA | Map |
| Leguminosae | Dalea leporina | , foxtail prairie clover | LAMOURE, MCINTOSH, RANSOM, SIOUX | GFND, NDSU, USDA | Map |
| Leguminosae | Dalea occidentalis | BILLINGS, BURLEIGH, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WILLIAMS | NDSU | Map | |
| Leguminosae | Dalea purpurea | , purple prairie clover | ADAMS, BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GOLDEN VALLLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RENVILLE, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, USDA | Map |
| Leguminosae | Dalea villosa | , silky prairie clover | EDDY, EMMONS, GRANT, MERCER, MORTON | DK1995, GFND, NDSU, USDA | Map |
| Gramineae | Danthonia californica | NDSU | Map | ||
| Gramineae | Danthonia parryi | NDSU | Map | ||
| Gramineae | Danthonia spicata | , poverty oatgrass | BURKE, DIVIDE, DUNN, WILLIAMS | MSU, NDSU, USDA | Map |
| Solanaceae | Datura stramonium | , jimsonweed | USDA | Map | |
| Umbelliferae | Daucus carota | , Queen Anne's lace | GRAND FORKS, NELSON | GFND, GFND, USDA | Map |
| Ranunculaceae | Delphinium bicolor | , little larkspur | WILLIAMS | GFND, USDA | Map |
| Ranunculaceae | Delphinium carolinianum | , Carolina larkspur | BILLINGS, BURKE, DICKEY, EMMONS, GRANDFORKS, LAMOURE, MCINTOSH, RANSOM, STUTSMAN | GFND, NDSU, USDA | Map |
| Ranunculaceae | Delphinium virescens | EDDY, FOSTER, GRAND FORKS, NELSON, RANSOM, RICHLAND, STUTSMAN | DK1995, GFND, NPWRC | Map | |
| Gramineae | Deschampsia cespitosa | , tufted hairgrass | BURKE, DIVIDE, EDDY, GRAND FORKS, KIDDER, MCHENRY, MOUNTRAIL, STUTSMAN, WALAH, WILLIAMS | DK1995, GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Gramineae | Deschampsia flexuosa | , wavy hairgrass | USDA | Map | |
| Cruciferae | Descurainia incana | , mountain tansymustard | EMMONS, LAMOURE, MORTON, MOUNTRAIL, STUTSMAN, WARD | MSU, NDSU, USDA | Map |
| Cruciferae | Descurainia paradisa | BILLINGS, DUNN, GRANT, KIDDER, LAMOURE, MCKENZIE, MORTON, MOUNTRAIL, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | NDSU | Map | |
| Cruciferae | Descurainia pinnata | , western tansymustard | BILLINGS, CASS, EDDY, STARK, STUTSMAN | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Cruciferae | Descurainia richardsonii | BILLINGS, BOWMAN, EDDY, GRAND FORKS | DK1995, GFND | Map | |
| Cruciferae | Descurainia sophia | , herb sophia | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, KIDDRE, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Desmanthus illinoensis | , Illinois bundleflower | GFND, USDA | Map | |
| Leguminosae | Desmodium canadense | , showy ticktrefoil | BURLEIGH, DICKEY, EDDY, EMMONS, GRAND FORKS, MORTON, RAMSEY, RANSOM | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Leguminosae | Desmodium glutinosum | , pointedleaf ticktrefoil | RICHLAND | NPWRC, USDA | Map |
| Caryophyllaceae | Dianthus barbatus | , sweetwilliam | USDA | Map | |
| Caryophyllaceae | Dianthus plumarius | , feathered pink | USDA | Map | |
| Papaveraceae | Dicentra cucullaria | , dutchman's breeches | GRAND FORKS | GFND, USDA | Map |
| Papaveraceae | Dicentra spectabilis | GRAND FORKS | GFND | Map | |
| Gramineae | Dichanthelium acuminatum | , tapered rosette grass | MCINTOSH | NDSU, USDA | Map |
| Gramineae | Dichanthelium leibergii | , Leiberg's panicum | BENSON, DICKEY, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, RANSOM, STUTSMAN | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Gramineae | Dichanthelium linearifolium | , slimleaf panicgrass | USDA | Map | |
| Gramineae | Dichanthelium longiligulatum | , coastal plain panicgrass | USDA | Map | |
| Gramineae | Dichanthelium oligosanthes | , Heller's rosette grass | BOWMAN, GRANT | NDSU, USDA | Map |
| Gramineae | Dichanthelium scabriusculum | MCINTOSH | NDSU | Map | |
| Gramineae | Dichanthelium villosissimum | , whitehair rosette grass | USDA | Map | |
| Gramineae | Dichanthelium wilcoxianum | , fall rosette grass | ADAMS, BENSON, BILLINGS, DICKEY, DUNN, EDDY, EMMONS, GRANT, KIDDER, MERCER, MORTON, RANSOM, SHERIDAN, STUTSMAN | DK1995, GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Gramineae | Diectomis fastigiata | NDSU | Map | ||
| Caprifoliaceae | Diervilla lonicera | , northern bush honeysuckle | USDA | Map | |
| Gramineae | Digitaria ischaemum | , smooth crabgrass | BURLEIGH, GRAND FORKS, STARK, WILLIAMS | GFND, NDSU, USDA | Map |
| Gramineae | Digitaria sanguinalis | , hairy crabgrass | CASS, STUTSMAN | NDSU, NPWRC, USDA | Map |
| Thymelaeaceae | Dirca palustris | , eastern leatherwood | USDA | Map | |
| Gramineae | Distichlis spicata | , saltgrass | ADAMS, BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RICHLAND, ROLETTE, SARGENT, SHERIDAN, SIOUX, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Primulaceae | Dodecatheon pulchellum | , darkthroat shootingstar | BURKE, DIVIDE, MOUNTRAIL, RENVILLE | MSU, NDSU, USDA | Map |
| Primulaceae | Dodecatheon radicatum | BOWMAN, BURKE, WILLIAMS | NDSU | Map | |
| Compositae | Doellingeria umbellata | , parasol whitetop | EDDY, MCHENRY, RANSOM, ROLETTE | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Cruciferae | Draba nemorosa | , woodland draba | ADAMS, BENSON, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDRE, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MORTON, MOUNTRAIL, OLIVER, RAMSOM, SLOPE, STARK, STUTSMAN, STUTSMNA, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Draba reptans | , Carolina draba | BILLINGS, BURLEIGH, EMMONS, GRAND FORKS, LAMOURE, MCLEAN, STARK, STUTSMAN, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Dracocephalum parviflorum | , American dragonhead | DIVIDE, DUNN, EDDY, KIDDER, MCKENZIE, MORTON, MOUNTRAIL, RAMSEY, RICHLAND, STUTSMAN, WARD, WELLS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Dracocephalum thymiflorum | , thymeleaf dragonhead | HETTINGER, STARK | NDSU, USDA | Map |
| Compositae | Dracopis amplexicaulis | , clasping coneflower | USDA | Map | |
| Caprifoliaceae | Drosera rotundifolia | , roundleaf sundew | BOTTINEAU | GFND, USDA | Map |
| Polypodiaceae | Dryopteris campyloptera | RANSOM, RICHLAND | NDSU | Map | |
| Polypodiaceae | Dryopteris carthusiana | , spinulose woodfern | RICHLAND | NPWRC, USDA | Map |
| Polypodiaceae | Dryopteris cristata | , crested woodfern | BOTTINEAU, RICHLAND | GFND, NPWRC, USDA | Map |
| Polypodiaceae | Dryopteris uliginosa | USDA | Map | ||
| Compositae | Dyssodia papposa | , fetid marigold | BILLINGS, BURLEIGH, DUNN, GOLDEN VALLEY, GRANT, MCKENZIE, MERCER, MORTON, SIOUX, SLOPE, STARK | NDSU, NPWRC, USDA | Map |
| Compositae | Echinacea angustifolia | , blacksamson echinacea | ADAMS, BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, NELSON, OLIVER, RANSOM, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Echinacea pallida | MCKENZIE, MERCER, WILLIAMS | GFND | Map | |
| Cactaceae | Echinocereus coccineus | BILLINGS, BURLEIGH, EMMONS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, STUTSMAN, WILLIAMS | NDSU | Map | |
| Gramineae | Echinochloa crus-galli | , barnyardgrass | ADAMS, BILLINGS, BOWMAN, BURLEIGH, CASS, DIVIDE, EDDY, GRAND FORKS, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MORTON, MOUNTRAIL, RAMSEY, RANSOM, RICHLAND, SARGENT, SLOPE, STARK, STUTSMAN, WARD | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Gramineae | Echinochloa frumentacea | , billion-dollar grass | USDA | Map | |
| Gramineae | Echinochloa muricata | , rough barnyardgrass | BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, KIDDER, LAMOURE, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS | DK1995, MSU, NDSU, USDA | Map |
| Cucurbitaceae | Echinocystis lobata | , wild cucumber | BARNES, BOTTINEAU, CASS, EDDY, GRAND FORKS, GRIGGS, MCHENRY, PEMBINA, RANSOM, RICHLAND, SARGENT, STEELE, STUTSMAN, WALSH, WARD, WILLIAMS | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Elaeagnaceae | Elaeagnus angustifolia | , Russian olive | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, MCHENRY, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, RANSOM, RENVILLE, RICHLAND, SARGENT, STARK, STEELE, STUTSMAN, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, USDA | Map |
| Elaeagnaceae | Elaeagnus commutata | , silverberry | BARNES, BENSON, BOTTINEAU, BURKE, CASS, DIVIDE, EDDY, FOSTER, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, MCHENRY, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RENVILLE, ROLETTE, SHERIDAN-WELLS LINE, SLOPE, STARK, STEELE, STUTSMAN, TOWNER, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Elatinaceae | Elatine rubella | , southwestern waterwort | HETTINGER, LOGAN, WARD | MSU, NDSU, USDA | Map |
| Cyperaceae | Eleocharis acicularis | , needle spikerush | BENSON, BILLINGS, BOWMAN, BURKE, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Eleocharis compressa | , flatstem spikerush | BENSON, BURKE, DICKEY, EDDY, GRANT, LAMOURE, MCHENRY, RICHLAND, SLOPE, STUTSMAN | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Eleocharis engelmannii | , Engelmann's spikerush | BENSON, BURKE, RANSOM, WARD | GFND, MSU, MSU, USDA | Map |
| Cyperaceae | Eleocharis erythropoda | , bald spikerush | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, ROLETTE, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Eleocharis macrostachya | , pale spikerush | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, KIDDER, LOGAN, MCINTOSH, MCLEAN, MORTON, MOUNTRAIL, SLOPE, STARK, STUTSMAN, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Eleocharis obtusa | BURKE, DICKEY, DIVIDE, MOUNTRAIL, PIERCE, RICHLAND, SHERIDAN, STUTSMAN | NDSU, NPWRC | Map | |
| Cyperaceae | Eleocharis ovata | STUTSMAN | GFND | Map | |
| Cyperaceae | Eleocharis palustris | , common spikerush | BENSON, BURKE, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, MCKENZIE, MCLEAN, MERCER, NELSON, OLIVER, SLOPE, STARK, STEELE, STUTSAMN, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, DK1995, NPWRC, MSU, NDSU, USDA | Map |
| Cyperaceae | Eleocharis parvula | BURLEIGH, KIDDER, MCINTOSH | NDSU, USDA | Map | |
| Cyperaceae | Eleocharis quinqueflora | , fewflower spikerush | BENSON, BURKE, KIDDER, MCHENRY, STUTSMAN | GFND, NDSU, USDA | Map |
| Cyperaceae | Eleocharis rostellata | , beaked spikerush | USDA | Map | |
| Cyperaceae | Eleocharis tenuis | GFND | Map | ||
| Cyperaceae | Eleocharis uniglumis | , onescale spikerush | USDA | Map | |
| Cyperaceae | Eleocharis wolfii | , Wolf's spikerush | USDA | Map | |
| Gramineae | Eleusine indica | , Indian goosegrass | USDA | Map | |
| Boraginaceae | Ellisia nyctelea | , Aunt Lucy | BARNES, BENSON, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CASS, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STEELE, STUTSMAN, TRAILL, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NPWRC, NDSU, NPWRC, USDA | Map |
| Hydrocharitaceae | Elodea bifoliata | , twoleaf waterweed | BENSON, GOLDEN VALLEY, RANSOM | NDSU, USDA | Map |
| Hydrocharitaceae | Elodea canadensis | , Canadian waterweed | DICKEY, EDDY, EMMONS, GRAND FORKS, LAMOURE, LOGAN, MCINTOSH, MORTON, SIOUX, STUTSMAN, WARD | DK1995, NDSU, NPWRC, USDA | Map |
| Hydrocharitaceae | Elodea nuttallii | , western waterweed | GRAND FORKS | GFND, USDA | Map |
| Labiatae | Elsholtzia ciliata | , crested latesummer mint | USDA | Map | |
| Gramineae | Elyhordeum iowense | , Iowa barley | USDA | Map | |
| Gramineae | Elyhordeum macounii | , Macoun's barley | ADAMS, BURKE, LOGAN, RANSOM, SHERIDAN, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Elyhordeum montanense | , mountain barley | USDA | Map | |
| Gramineae | Elymus alaskanus | RANSOM | NDSU | Map | |
| Gramineae | Elymus albicans | , Montana wheatgrass | DICKINSON, EDDY, GRAND FORKS, GRANT, MERCER, RAMSEY, STARK, STUTSMAN, WILLIAMS | GFND, NDSU, USDA | Map |
| Gramineae | Elymus canadensis | , Canada wildrye | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RAMSAY, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SLOPE, STARK, STEELE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Elymus caninus | BOTTINEAU, DICKEY, EDDY, EDDY6, LAMOURE, MCHENRY, MERCER, PIERCE, RAMSEY, SLOPE, STUTSMAN | NDSU, NDSU | Map | |
| Gramineae | Elymus cinereus | STUTSMAN | NPWRC | Map | |
| Gramineae | Elymus diversiglumis | , diverseglume wildrye | GRAND FORKS, OLIVER, RANSOM, RICHLAND | GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Gramineae | Elymus elymoides | , squirreltail | BILLINGS, BURLEIGH, EMMONS, SIOUX, SLOPE, STARK | GFND, NPWRC, NDSU, USDA | Map |
| Gramineae | Elymus glaucus | , blue wildrye | BOTTINEAU | GFND, USDA | Map |
| Gramineae | Elymus hystrix | , eastern bottlebrush grass | CASS, GRAND FORKS, RAMSEY, RANSOM, RICHLAND, WALSH | GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Elymus lanceolatus | , thickspike wheatgrass | BILLINGS, BURKE, DICKEY, DIVIDE, GRANT, HETTINGER, LAMOURE, MCKENZIE, MOUNTRAIL, SLOPE, STARK, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Gramineae | Elymus repens | , quackgrass | BARNES, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, MOUNTRIAL, OLIVER, PIERCE, RAMSEY, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, TOWNER, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Gramineae | Elymus submuticus | , Virginia wildrye | USDA | Map | |
| Gramineae | Elymus trachycaulus | , slender wheatgrass | BURKE, GOLDEN VALLEY, MERCER, MOUNTRAIL, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Gramineae | Elymus villosus | , hairy wildrye | BARNES, BENSON, DICKEY, EDDY, GRAND FORKS, KIDDER, MERCER, OLIVER, RAMSEY, RANSOM, RICHLAND, SIOUX, STEELE, STUTSMAN, WALSH | DK1995, GFND, NDSU, USDA | Map |
| Gramineae | Elymus virginicus | , Virginia wildrye | BARNES, BILLINGS, BOTTINEAU, BURLEIGH, CASS, CAVALIER, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PIERCE, RANSOM, RICHLAND, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Elymus wiegandii | , Wiegand's wildrye | BILLING, SIOUX, WARD | NDSU, USDA | Map |
| Amaranthaceae | Endolepis dioica | , Suckley's endolepis | BILLINGS, DUNN, GOLDEN VALLEY, MCKENZIE, MOUNTRAIL, SIOUX, SLOPE, STARK, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Onagraceae | Epilobium adenocaulon | BENSON, MCHENRY, RANSOM, RICHLAND, STUTSMAN | GFND, NPWRC | Map | |
| Onagraceae | Epilobium angustifolium | BENSON, BOTTINEAU, CAVALIER, EDDY, GRAND FORKS, RANSOM, ROLETTE, STUTSMAN, WALSH | DK1995, GFND, NPWRC | Map | |
| Onagraceae | Epilobium brachycarpum | , tall annual willowherb | BENSON, BILLINGS, BURKE, DIVIDE, GRANT, MOUNTRAIL, SLOPE, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Onagraceae | Epilobium ciliatum | , fringed willowherb | BILLINGS, BOWMAN, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MOUNTRAIL, OLIVER, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, MSU, NDSU, USDA | Map |
| Onagraceae | Epilobium coloratum | , purpleleaf willowherb | STUTSMAN | NDSU, USDA | Map |
| Onagraceae | Epilobium densum | RANSOM | GFND | Map | |
| Onagraceae | Epilobium glandulosum | GRAND FORKS | GFND | Map | |
| Onagraceae | Epilobium hornemannii | GFND | Map | ||
| Onagraceae | Epilobium leptocarpum | WARD | MSU | Map | |
| Onagraceae | Epilobium leptophyllum | , bog willowherb | BOWMAN, BURKE, DIVIDE, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MCINTOSH, OLIVER, RICHLAND, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Onagraceae | Epilobium lineare | GFND | Map | ||
| Onagraceae | Epilobium palustre | BOTTINEAU | GFND | Map | |
| Onagraceae | Epilobium pygmaeum | , smooth spike-primrose | BILLINGS, HETTINGER | NDSU, USDA | Map |
| Onagraceae | Epilobium strictum | BILLINGS | GFND | Map | |
| Equisetaceae | Equisetum arvense | , field horsetail | BURLEIGH, CASS, EDDY, EMMONS, FOSTER, GRAND FORKS, MORTON, OLIVER, RAMSEY, RANSOM, RICHLAND, RICHLANND, SARGENT, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Equisetaceae | Equisetum ferrisii | EDDY, RANSOM, WARD | DK1995, MSU, NDSU, NPWRC, USDA | Map | |
| Equisetaceae | Equisetum fluviatile | , water horsetail | BOTTINEAU, RANSOM, ROLETTE, WARD | MSU, NDSU, NPWRC, USDA | Map |
| Equisetaceae | Equisetum hyemale | , scouringrush horsetail | BENSON, CASS, EDDY, EMMONS, FOSTER, GRAND FORKS, PIERCE, RAMSEY, RICHLAND | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Equisetaceae | Equisetum laevigatum | , smooth horsetail | BARNES, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MERCER, MOUNTRAIL, RAMSEY, RANSOM, RICHLAND, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Equisetaceae | Equisetum litorale | USDA | Map | ||
| Equisetaceae | Equisetum palustre | , marsh horsetail | USDA | Map | |
| Equisetaceae | Equisetum pratense | , meadow horsetail | USDA | Map | |
| Equisetaceae | Equisetum scirpoides | , dwarf scouringrush | USDA | Map | |
| Equisetaceae | Equisetum sylvaticum | , woodland horsetail | PEMBINA | NPWRC, USDA | Map |
| Equisetaceae | Equisetum variegatum | MCHENRY | GFND, NDSU | Map | |
| Gramineae | Eragrostis cilianensis | , stinkgrass | BILLINGS, BURLEIGH, CASS, DICKEY, EDDY, EMMONS, FOSTER, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MERCER, MORTON, RAMSEY, RANSOM, RICHLAND, SIOUX, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Eragrostis hypnoides | CASS, EMMONS, GRAND FORKS, RANSOM, STUTSMAN, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map | |
| Gramineae | Eragrostis mexicana | , Mexican lovegrass | USDA | Map | |
| Gramineae | Eragrostis pectinacea | , tufted lovegrass | BILLINGS, EDDY, WARD | GFND, NDSU, USDA | Map |
| Gramineae | Eragrostis pilosa | , Indian lovegrass | BURKE | MSU, USDA | Map |
| Gramineae | Eragrostis spectabilis | , purple lovegrass | RANSOM, SARGENT | NDSU, USDA | Map |
| Compositae | Ericameria nauseosa | , rubber rabbitbrush | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Compositae | Erigeron acris | GFND | Map | ||
| Compositae | Erigeron annuus | , eastern daisy fleabane | BENSON | GFND, USDA | Map |
| Compositae | Erigeron asper | , rough fleabane | USDA | Map | |
| Compositae | Erigeron caespitosus | , tufted fleabane | BURKE, DIVIDE, DUNN, MOUNTRAIL, WARD, WILLIAMS | MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Erigeron canadensis | BENSON, BILLINGS, GRAND FORKS, MERCER, RANSOM | GFND | Map | |
| Compositae | Erigeron compositus | , cutleaf daisy | BILLINGS, DIVIDE, GOLDEN VALLEY, MCKENZIE, MOUNTRAIL, SLOPE, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Compositae | Erigeron divaricatus | BILLINGS | GFND | Map | |
| Compositae | Erigeron divergens | , spreading fleabane | USDA | Map | |
| Compositae | Erigeron glabellus | , streamside fleabane | BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RENVILLE, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, TOWNER, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Erigeron lonchophyllus | , shortray fleabane | DIVIDE, EDDY, KIDDER, MCHNERY, WARD | DK1995, NDSU, MSU, NDSU, USDA | Map |
| Compositae | Erigeron ochroleucus | , buff fleabane | USDA | Map | |
| Compositae | Erigeron philadelphicus | , Philadelphia fleabane | BARNES, BENSON, BOTTINEAU, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCLEAN, MORTON, MOUNTRAIL, RAMSEY, RANSOM, RICHLAND, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Erigeron pumilus | , shaggy fleabane | BILLINGS, BOWMAN, BURKE, DIVIDE, EMMONS, GOLDEN VALLEY, GRANT, MCINTOSH, MCKENZIE, MERCER, MOUNTRAIL, OLIVER, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Erigeron radicatus | , taproot fleabane | DUNN | GFND, NDSU, USDA | Map |
| Compositae | Erigeron strigosus | , prairie fleabane | ADAMS, BARNES, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Erigeron subtrinervis | , threenerve fleabane | BOWMAN, OLIVER, SLOPE, STARK, WARD | GFND, MSU, NDSU, USDA | Map |
| Boraginaceae | Eriodictyon angustifolium | , narrowleaf yerba santa | USDA | Map | |
| Polygonaceae | Eriogonum annuum | , annual buckwheat | GOLDEN VALLEY, MORTON, SLOPE | GFND, NDSU, USDA | Map |
| Polygonaceae | Eriogonum cernuum | , nodding buckwheat | DUNN, SLOPE | NDSU, USDA | Map |
| Polygonaceae | Eriogonum flavum | , alpine golden buckwheat | ADAMS, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, WARD, WILLIAMS | GFND, GFND, MSU, MSU, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Eriogonum gordonii | MOUNTRAIL | MSU | Map | |
| Polygonaceae | Eriogonum lagopus | BILLINGS, BOWMAN, DUNN, GOLDEN VALLEY, GRANT, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SLOPE, STARK, WILLIAMS | NDSU | Map | |
| Polygonaceae | Eriogonum multiceps | BILLINGS, MCKENZIE, SLOPE | GFND, GFND | Map | |
| Polygonaceae | Eriogonum pauciflorum | , fewflower buckwheat | BILLINGS, DUNN, GOLDEN VALLEY, GRANT, MCKENZIE, MOUNTRAIL, SLOPE, STARK, WARD, WILLIAMS | GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Eriogonum visheri | , Visher's buckwheat | BILLINGS, GOLDEN VALLEY, GRANT, MCKENZIE, MOUNTRAIL, SLOPE | GFND, NDSU, NDSU, USDA | Map |
| Cyperaceae | Eriophorum angustifolium | , tall cottongrass | BURKE, DIVIDE, KIDDER, LAMOURE, LOGAN, MCINTOSH, MOUNTRAIL, WILLIAMS | GFND, NDSU, USDA | Map |
| Cyperaceae | Eriophorum chamissonis | , Chamisso's cottongrass | BOTTINEAU | GFND, NPWRC, USDA | Map |
| Cyperaceae | Eriophorum gracile | , slender cottongrass | USDA | Map | |
| Cyperaceae | Eriophorum polystachion | EDDY, KIDDER, MCHENRY, STUTSMAN | DK1995, NPWRC | Map | |
| Cyperaceae | Eriophorum polystachyon | GFND | Map | ||
| Cyperaceae | Eriophorum viridicarinatum | , thinleaf cottonsedge | BOTTINEAU, BURKE, DIVIDE, KIDDER, RANSOM, WARD | GFND, GFND, MSU, NDSU, USDA | Map |
| Geraniaceae | Erodium cicutarium | , redstem stork's bill | USDA | Map | |
| Cruciferae | Erucastrum gallicum | , common dogmustard | BILLINGS, BURKE, BURLEIGH, DICKEY, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDRE, MCKENZIE, MOUNTRAIL, STARK, STUTSMAN, WALSH, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Cruciferae | Erucastrum pollichii | GRAND FORKS | GFND | Map | |
| Cruciferae | Eruca vesicaria | , rocketsalad | USDA | Map | |
| Cruciferae | Erysimum angustatum | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, KIDDRE, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUSTMAN, STUTSMAN, STUTSMNA, WARD, WELLS, WILLIAMS | NDSU | Map | |
| Cruciferae | Erysimum asperum | , western wallflower | BILLINGS, BURKE, EDDY, GRAND FORKS, MCHENRY, MOUNTRAIL, PIERCE, RANSOM, RICHLAND, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Cruciferae | Erysimum cheiranthoides | , wormseed wallflower | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDRE, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, SLOPE, STARK, STUSTMAN, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, DK1995, GFND, MSU, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Erysimum coarctatum | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLICER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | NDSU | Map | |
| Cruciferae | Erysimum inconspicuum | , shy wallflower | BILLINGS, EDDY, FOSTER, GRAND FORKS, MOUNTRAIL, PIERCE, STUTSMAN, TOWNER, WARD | DK1995, GFND, GFND, MSU, NPWRC, USDA | Map |
| Cruciferae | Erysimum parviflorum | GRAND FORKS, MCHENRY, SLOPE, STUTSMAN, WILLIAMS | GFND | Map | |
| Cruciferae | Erysimum repandum | , spreading wallflower | USDA | Map | |
| Cactaceae | Escobaria missouriensis | , Missouri foxtail cactus | BILLINGS, BURLEIGH, GOLDEN VALLEY, MCKENZIE, STARK | GFND, NDSU, USDA | Map |
| Cactaceae | Escobaria vivipara | , spinystar | BARNES, BENSON, BILLINGS, EDDY, MCHENRY, SLOPE, STUTSMAN, WARD | GFND, DK1995, GFND, NDSU, NPWRC, MSU, USDA | Map |
| Celastraceae | Euonymus alatus | GRAND FORKS | GFND | Map | |
| Celastraceae | Euonymus atropurpureus | , burningbush | RANSOM | GFND, USDA | Map |
| Compositae | Eupatoriadelphus maculatus | , spotted trumpetweed | BARNES, BOTTINEAU, CASS, DICKEY, EDDY, GRAND FORKS, KIDDER, RANSOM, RICHLAND, ROLETTE, STUTSMAN, WALSH | DK1995, GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Compositae | Eupatorium altissimum | WARD | MSU | Map | |
| Compositae | Eupatorium perfoliatum | , common boneset | RANSOM, RICHLAND | GFND, NPWRC, USDA | Map |
| Euphorbiaceae | Euphorbia agraria | , urban spurge | USDA | Map | |
| Euphorbiaceae | Euphorbia brachycera | , horned spurge | BILLINGS | GFND, USDA | Map |
| Euphorbiaceae | Euphorbia cyparissias | , cypress spurge | GFND, USDA | Map | |
| Euphorbiaceae | Euphorbia esula | , leafy spurge | BENSON, BURKE, CASS, EDDY, GRAND FORKS, MERCER, MORTON, PIERCE, RANSOM, RICHLAND, STEELE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, MSU, NPWRC, USDA | Map |
| Euphorbiaceae | Euphorbia helioscopia | , madwoman's milk | USDA | Map | |
| Euphorbiaceae | Euphorbia marginata | , snow on the mountain | USDA | Map | |
| Euphorbiaceae | Euphorbia peplus | , petty spurge | USDA | Map | |
| Euphorbiaceae | Euphorbia spathulata | , warty spurge | USDA | Map | |
| Compositae | Euthamia graminifolia | , flat-top goldentop | BURKE, DICKEY, EDDY, KIDDER, MOUNTRAIL, STUTSMAN, WARD | DK1995, MSU, NDSU, USDA | Map |
| Compositae | Euthamia gymnospermoides | , Texas goldentop | USDA | Map | |
| Convolvulaceae | Evolvulus nuttallianus | , shaggy dwarf morning-glory | USDA | Map | |
| Polygonaceae | Fagopyrum esculentum | , buckwheat | EDDY, GRAND FORKS, WARD | GFND, DK1995, MSU, USDA | Map |
| Gramineae | Festuca altaica | BURKE, DIVIDE, GRAND FORKS, MCHENRY, MOUNTRAIL, TOWNER, WARD, WILLIAMS | GFND, MSU, NPWRC, NDSU | Map | |
| Gramineae | Festuca brachyphylla | BURKE, DUNN, KIDDER, LAMOURE, MOUNTRAIL, WILLIAMS | NDSU | Map | |
| Gramineae | Festuca brevipila | , hard fescue | BENSON, BURKE, DIVIDE, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, MCHENRY, MOUNTRAIL, STUTSMAN | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Festuca hallii | , plains rough fescue | WARD | MSU, USDA | Map |
| Gramineae | Festuca idahoensis | MERCER | GFND | Map | |
| Gramineae | Festuca rubra | , red fescue | USDA | Map | |
| Gramineae | Festuca saximontana | , Rocky Mountain fescue | WARD | NDSU, USDA | Map |
| Gramineae | Festuca subverticillata | , nodding fescue | BENSON, DICKEY, EDDY, GRAND FORKS, RANSOM, RICHLAND, WALSH | DK1995, GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Gramineae | Festuca thurberi | MCHENRY | GFND | Map | |
| Loasaceae | Floerkea proserpinacoides | , false mermaidweed | USDA | Map | |
| Rosaceae | Fragaria glauca | BENSON | GFND | Map | |
| Rosaceae | Fragaria vesca | , woodland strawberry | BILLINGS, BURLEIGH, DUNN, GOLDEN VALLEY, GRAND FORKS, MCKENZIE, MCLEAN, MERCER, MORTON, OLIVER, RICHLAND, ROLLETTE, SLOPE, STARK, STUTSMAN, WALSH | GFND, NDSU, USDA | Map |
| Rosaceae | Fragaria virginiana | , Virginia strawberry | BILLINGS, BOTTINEAU, BURKE, CAVILIER, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MCHENRY, MCKENZIE, MCLEAN, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, ROLETTE, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Oleaceae | Fraxinus nigra | , black ash | PEMBINA | GFND, NPWRC, USDA | Map |
| Oleaceae | Fraxinus pennsylvanica | , green ash | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RICHLAND, ROLETTE, SARGENT, SIOUX, SLOPE, STARK, STUTSMAN, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Oleaceae | Fraxinus viridis | GRAND FORKS | GFND | Map | |
| Liliaceae | Fritillaria atropurpurea | , spotted fritillary | BILLINGS, DUNN, EMMONS, GOLDEN VALLEY, MCKENZIE, MOUNTRAIL, SIOUX, SLOPE, STARK, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Liliaceae | Fritillaria lanceolata | GFND | Map | ||
| Liliaceae | Fritillaria pudica | , yellow fritillary | BILLLINGS | NDSU, USDA | Map |
| Papaveraceae | Fumaria vaillantii | , earthsmoke | BURLEIGH, EDDY, GRAND FORKS, STUTSMAN, WARD, WELLS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Compositae | Gaillardia aristata | , blanketflower | BARNES, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, SARGENT, SHERDIAN, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Gaillardia pulchella | BENSON, CASS, MORTON, PIERCE, RANSOM, SHERIDAN, SLOPE | GFND, GFND, NDSU | Map | |
| Labiatae | Galeopsis bifida | , splitlip hempnettle | USDA | Map | |
| Labiatae | Galeopsis tetrahit | , brittlestem hempnettle | GRAND FORKS, WALSH | GFND, USDA | Map |
| Compositae | Galinsoga parviflora | , gallant soldier | USDA | Map | |
| Compositae | Galinsoga quadriradiata | , shaggy soldier | GRAND FORKS, MCHENRY | GFND, NDSU, USDA | Map |
| Rubiaceae | Galium aparine | , stickywilly | BARNES, BENSON, BILLINGS, BURKE, CASS, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRIGGS, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MOUNTRAIL, PEMBINA, RAMSEY, RANSOM, RICHLAND, SARGENT, SLOPE, STARK, STEELE, STUTSMAN, TRAIL, TRAILL, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rubiaceae | Galium boreale | , northern bedstraw | ADAMS, BARNES, BENSON, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, PEMBINA, PIERCE, RAMSEY, RANSOM, RENVILLE, RICHLAND, ROLETTE, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STEELE, STUTSAN, STUTSMAN, TOWNER, TRAILL, WALSH, WARD, WELLS, WILIIAMS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rubiaceae | Galium brevipes | , limestone swamp bedstraw | USDA | Map | |
| Rubiaceae | Galium labradoricum | , northern bog bedstraw | BOTTINEAU, MCHENRY | GFND, NPWRC, USDA | Map |
| Rubiaceae | Galium trifidum | , threepetal bedstraw | BARNES, BENSON, BOTTINEAU, BURKE, CAVALIER, EDDY, EMMONS, GRAND FORKS, KIDDER, MCINTOSH, MOUNTRAIL, PEMBINA, RANSOM, RICHLAND, ROLETTE, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rubiaceae | Galium triflorum | , fragrant bedstraw | BARNES, BENSON, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CASS, EDDY, GOLDEN VALLEY, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, MCHENRY, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, RANSOM, RICHLAND, ROLETTE, SLOPE, STEELE, STUTSMAN, TRAILL, WALSH, WARD, WELLS | DK1995, GFND, MSU, NDSU, USDA | Map |
| Rubiaceae | Galium verum | , Yellow Spring bedstraw | STARK | NDSU, USDA | Map |
| Onagraceae | Gaura coccinea | , scarlet beeblossom | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, PIERCE, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Onagraceae | Gaura mollis | , velvetweed | USDA | Map | |
| Gentianaceae | Gentiana affinis | , pleated gentian | BENSON, BILLINGS, BURKE, DIVIDE, EDDY, KIDDER, MCINTOSH, MCKENZIE, MOUNTRAIL, RAMSEY, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Gentianaceae | Gentiana andrewsii | , closed bottle gentian | CAVALIER, DICKEY, EDDY, GRAND FORKS, GRIGGS, KIDDER, RAMSEY, RANSOM, RICHLAND, SARGENT, STUTSMAN, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Gentianaceae | Gentiana procera | RANSOM | GFND | Map | |
| Gentianaceae | Gentiana puberulenta | , downy gentian | EDDY, GRAND FORKS, LAMOURE, SIOUX | DK1995, GFND, NDSU, USDA | Map |
| Gentianaceae | Gentianella amarella | , autumn dwarf gentian | BENSON, BILLINGS, BOTTINEAU, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRIGGS, HETTINGER, KIDDER, LOGAN, MOUNTRAIL, ROLETTE, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Gentianaceae | Gentianopsis crinita | , greater fringed gentian | EDDY | DK1995, USDA | Map |
| Gentianaceae | Gentianopsis detonsa | BENSON | GFND | Map | |
| Gentianaceae | Gentianopsis macounii | , Macoun's fringed gentian | USDA | Map | |
| Gentianaceae | Gentianopsis virgata | , lesser fringed gentian | BURKE, EDDY, KIDDER, LOGAN, STUTSMAN | DK1995, NPWRC, NDSU, USDA | Map |
| Geraniaceae | Geranium bicknellii | , Bicknell's cranesbill | EDDY | NPWRC, USDA | Map |
| Geraniaceae | Geranium carolinianum | , Carolina geranium | GRAND FORKS, ROLETTE, SIOUX | GFND, GFND, NPWRC, USDA | Map |
| Geraniaceae | Geranium columbinum | , longstalk cranesbill | USDA | Map | |
| Geraniaceae | Geranium maculatum | , spotted geranium | USDA | Map | |
| Geraniaceae | Geranium pusillum | , small geranium | USDA | Map | |
| Rosaceae | Geum aleppicum | , yellow avens | BILLINGS, BOTTINEAU, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LOGAN, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Geum canadense | , white avens | DICKEY, DUNN, EDDY, GRAND FORKS, MCKENZIE, MCLEAN, OLIVER, RANSOM, RICHLAND, SLOPE, STARK, STUTSMAN, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Rosaceae | Geum ciliatum | BENSON | GFND | Map | |
| Rosaceae | Geum macrophyllum | , largeleaf avens | BENSON, GRAND FORKS, WALSH, WARD | GFND, MSU, NPWRC, USDA | Map |
| Rosaceae | Geum rivale | , purple avens | GFND, USDA | Map | |
| Rosaceae | Geum triflorum | , old man's whiskers | BILLINGS, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, RANSOM, SHERIDAN, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Primulaceae | Glaux maritima | , sea milkwort | BENSON, BURKE, EDDY, EMMOMS, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, LAMOURE, MCKENZIE, MOUNTRAIL, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Glechoma hederacea | , ground ivy | STUTSMAN | NDSU, NPWRC, USDA | Map |
| Leguminosae | Gleditsia triacanthos | , honeylocust | CASS, GRAND FORKS | GFND, USDA | Map |
| Gramineae | Glyceria borealis | , small floating mannagrass | BILLINGS, BURKE, BURLEIGH, DICKEY, EDDY, GRAND FORKS, KIDDER, MCINTOSH, MERCER, MOUNTRAIL, OLIVER, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Glyceria fluitans | BENSON | GFND | Map | |
| Gramineae | Glyceria grandis | , American mannagrass | BARNES, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RAMSEY, ROLETTE, SARGENT, SLOPE, STARK, STUTSMAN, TRAIL, TRAILL, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Glyceria maxima | NDSU | Map | ||
| Gramineae | Glyceria striata | , fowl mannagrass | BENSON, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, MERCER, MOUNTRAIL, OLIVER, RANSOM, SLOPE, STUTSMAN, WALSH | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Glycine max | GRAND FORKS | GFND | Map | |
| Leguminosae | Glycyrrhiza lepidota | , American licorice | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOROTN, MORTON, MOUNTRAIL, OLIVER, RANSOM, RENVILLE, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS, WILLIMAS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Gnaphalium exilifolium | BURKE | MSU, NDSU | Map | |
| Compositae | Gnaphalium palustre | , western marsh cudweed | BURKE, DIVIDE, MOUNTRAIL, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Compositae | Gnaphalium uliginosum | BURKE, WARD | MSU, NDSU | Map | |
| Plantaginaceae | Gratiola aurea | , golden hedgehyssop | USDA | Map | |
| Plantaginaceae | Gratiola neglecta | , clammy hedgehyssop | BILLINGS, BURKE, BURLEIGH, DIVIDE, MOUNTRAIL, OLIVER, STUTSMAN, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Gratiola virginiana | BENSON | GFND | Map | |
| Compositae | Grindelia squarrosa | , curlycup gumweed | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | GFND, DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Guizotia abyssinica | PIERCE | GFND | Map | |
| Compositae | Gutierrezia sarothrae | , broom snakeweed | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Gutierrezia texana | GFND | Map | ||
| Polypodiaceae | Gymnocarpium dryopteris | , western oakfern | CAVALIER, RANSOM | GFND, USDA | Map |
| Leguminosae | Gymnocladus dioica | GRAND FORKS | GFND | Map | |
| Leguminosae | Gymnocladus dioicus | , Kentucky coffeetree | USDA | Map | |
| Caryophyllaceae | Gypsophila elegans | , showy baby's-breath | USDA | Map | |
| Caryophyllaceae | Gypsophila paniculata | , baby's breath | BURKE, DIVIDE, DUNN, EDDY, GRANT, KIDDER, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, OLIVER, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, MSU, NDSU, NPWRC, USDA | Map |
| Orchidaceae | Habenaria leucophaea | RANSOM | NPWRC | Map | |
| Boraginaceae | Hackelia americana | BARNES, GRAND FORKS, STUTSMAN | GFND, NDSU | Map | |
| Boraginaceae | Hackelia deflexa | , nodding stickseed | BARNES, BENSON, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, NELSON, PEMBINA, PIERCE, RAMSEY, RANSOM, RICHLAND, ROLETTE, SARGENT, SLOPE, STARK, STEELE, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Boraginaceae | Hackelia floribunda | , manyflower stickseed | BENSON, BILLINGS, BOTTINEAU, BURKE, KIDDER, MOUNTRAIL, PIERCE-BARNES, RICHLAND, WARD | GFND, MSU, NDSU, USDA | Map |
| Boraginaceae | Hackelia virginiana | , beggarslice | BARNES, CASS, GRAND FORKS, RANSOM, RICHLAND, RICHLAND-RANSOM | GFND, NDSU, NPWRC, USDA | Map |
| Gentianaceae | Halenia deflexa | , American spurred gentian | USDA | Map | |
| Amaranthaceae | Halimodendron halodendron | , common salttree | USDA | Map | |
| Labiatae | Hedeoma drummondii | , Drummond's false pennyroyal | ADAMS, BILLINGS, BOWMAN, DUNN, GOLDEN VALLEY, GRANT, MCKENZIE, MERCER, MORTON, OLIVER, SLOPE, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Labiatae | Hedeoma hispida | , rough false pennyroyal | BARNES, BILLINGS, BURLEIGH, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, DK1995, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Hedeoma pulegioides | , American false pennyroyal | USDA | Map | |
| Leguminosae | Hedysarum alpinum | , alpine sweetvetch | USDA | Map | |
| Leguminosae | Hedysarum boreale | , Utah sweetvetch | BILLINGS, BURKE, DUNN, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SLOPE, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Helenium autumnale | , common sneezeweed | BARNES, BURKE, BURLEIGH, CAVALIER, DIVIDE, EDDY, GRAND FORKS, KIDDER, MCHENRY, MOUNTRAIL, RANSOM, RICHLAND, ROLETTE, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Helenium montanum | BENSON | GFND | Map | |
| Compositae | Helianthella quinquenervis | WARD | MSU | Map | |
| Cistaceae | Helianthemum bicknellii | , hoary frostweed | RANSOM | GFND, USDA | Map |
| Compositae | Helianthus annuus | , common sunflower | BENSON, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RANSOM, SARGENT, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Helianthus grosseserratus | , sawtooth sunflower | USDA | Map | |
| Compositae | Helianthus laetiflorus | GRAND FORKS, RANSOM | GFND, NDSU | Map | |
| Compositae | Helianthus maximiliani | , Maximilian sunflower | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCKNZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Helianthus microcephalus | GRAND FORKS | GFND | Map | |
| Compositae | Helianthus nuttallii | , Nuttall's sunflower | BENSON, BOTTINEAU, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCLEAN, MOUNTRAIL, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERIDAN, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Helianthus pauciflorus | , stiff sunflower | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | MSU, NDSU, USDA | Map |
| Compositae | Helianthus petiolaris | , prairie sunflower | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RANSOM, SARGENT, SHERDIAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Helianthus rigidus | BILLINGS, BURKE, DIVIDE, EDDY, GOLDEN VALLEY, GRAND FORKS, GRIGGS, MCHENRY, MERCER, MOUNTRAIL, PIERCE, RAMSEY, RANSOM, SARGENT, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC | Map | |
| Compositae | Helianthus scaberrimus | BENSON, GRAND FORKS | GFND | Map | |
| Compositae | Helianthus strumosus | , paleleaf woodland sunflower | USDA | Map | |
| Compositae | Helianthus tuberosus | , Jerusalem artichoke | BENSON, BURLEIGH, CASS, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCLEAN, MORTON, MOUNTRAIL, RANSOM, RICHLAND, SHERIDAN, STARK, STUTSMAN, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Heliopsis helianthoides | , smooth oxeye | BARNES, BENSON, CASS, EDDY, GRAND FORKS, RAMSEY, RANSOM, RICHLAND, WALSH | DK1995, GFND, GFND, NDSU, NPWRC, USDA | Map |
| Boraginaceae | Heliotropium curassavicum | , salt heliotrope | BENSON, BURLEIGH, CASS, EDDY, EMMONS, FOSTER, KIDDER, LOGAN, MCHENRY, MCINTOSH, PIERCE, RAMSEY, SARGENT, STUTSMAN | DK1995, NDSU, NPWRC, USDA | Map |
| Umbelliferae | Heracleum maximum | , common cowparsnip | BURKE, GRAND FORKS, ROLETTE, WARD | GFND, MSU, USDA | Map |
| Umbelliferae | Heracleum sphondylium | BILLINGS, BURKE, BURLEIGH, DUNN, EDDY, EMMONS, GRANT, KIDDER, LAMOURE, LOGAN, MOUNTRAIL, OLIVER, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WILLIAMS | DK1995, NPWRC, NDSU | Map | |
| Cruciferae | Hesperis matronalis | , dames rocket | BILLINGS, BURLEIGH, DICKEY, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Hesperostipa comata | , needle and thread | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, PEMBINA, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, TOWNER, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Gramineae | Hesperostipa curtiseta | , shortbristle needle and thread | BURKE, DIVIDE, EDDY, MCINTOSH, MOUNTRAIL, STARK, WARD | DK1995, NDSU, USDA | Map |
| Gramineae | Hesperostipa spartea | , porcupinegrass | BARNES, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Pontederiaceae | Heteranthera dubia | , grassleaf mudplantain | BARNES, EDDY, EMMONS, GRAND FORKS, MERCER, RICHLAND, TRAILL, WALSH | GFND, GFND, NDSU, NPWRC, USDA | Map |
| Compositae | Heterotheca villosa | , hairy false goldenaster | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Saxifragaceae | Heuchera richardsonii | , Richardson's alumroot | ADAMS, BENSON, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RANSOM, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Malvaceae | Hibiscus trionum | , flower of an hour | DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, MCINTOSH, MCLEAN, STUTSMAN | DK1995, GFND, NDSU, USDA | Map |
| Compositae | Hieracium canadense | BOTTINEAU, GRAND FORKS, RANSOM, SLOPE, WARD | GFND, MSU | Map | |
| Compositae | Hieracium floribundum | PIERCE | GFND | Map | |
| Compositae | Hieracium kalmii | , Kalm's hawkweed | USDA | Map | |
| Compositae | Hieracium pilosella | BENSON | GFND | Map | |
| Compositae | Hieracium scabrum | GRAND FORKS | GFND | Map | |
| Compositae | Hieracium umbellatum | , narrowleaf hawkweed | BILLINGS, BURKE, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, RAMSEY, STUTSMAN, WARD | DK1995, NDSU, USDA | Map |
| Gramineae | Hierochloe borealis | GFND | Map | ||
| Gramineae | Hierochloe hirta | , northern sweetgrass | BURKE, DICKEY, MOUNTRAIL, WARD | MSU, USDA | Map |
| Gramineae | Hierochloe odorata | BENSON, BURKE, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LOGAN, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RANSOM, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NDSU, NPWRC | Map | |
| Plantaginaceae | Hippuris vulgaris | , common mare's-tail | BOTTINEAU, BURKE, EDDY, GRAND FORKS, MOUNTRAIL, OLIVER, STUTSMAN | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Gramineae | Holcus lanatus | , common velvetgrass | USDA | Map | |
| Gramineae | Hordeum jubatum | , foxtail barley | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, RAMSAY, RAMSEY, RANSOM, RENVILLE, RICHLAND, ROLETTE, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Hordeum pusillum | , little barley | BILLINGS, GRAND FORKS, SLOPE | GFND, NDSU, USDA | Map |
| Gramineae | Hordeum vulgare | , common barley | BENSON, GRAND FORKS, MCINTOSH | GFND, NDSU, USDA | Map |
| Rubiaceae | Houstonia canadensis | , Canadian summer bluet | BENSON, NELSON | GFND, USDA | Map |
| Rubiaceae | Houstonia longifolia | , longleaf summer bluet | BENSON, EDDY, GRAND FORKS, MCHENRY, PEMBINA, TOWNER, WELLS | DK1995, NDSU, NPWRC, USDA | Map |
| Cistaceae | Hudsonia tomentosa | , woolly beachheather | USDA | Map | |
| Cannabaceae | Humulus japonicus | , Japanese hop | USDA | Map | |
| Cannabaceae | Humulus lupulus | , common hop | BARNES, BILLINGS, BOTTINEAU, BURKE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENIZE, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, ROLETTE, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Boraginaceae | Hydrophyllum virginianum | , eastern waterleaf | BARNES, CASS, EMMONS, GRAND FORKS, RANSOM, RICHLAND, SARGENT, STEELE, WALSH | GFND, NDSU, NPWRC, USDA | Map |
| Compositae | Hymenopappus filifolius | , fineleaf hymenopappus | BILLINGS, BOWMAN, DIVIDE, DUNN, GOLDEN VALLEY, GRANT, HETTINGER, MCKENZIE, MOUNTRAIL, SLOPE, STARK, WILLIAMS | NDSU, NPWRC, USDA | Map |
| Compositae | Hymenopappus tenuifolius | , Chalk Hill hymenopappus | ADAMS, BILLINGS, BOWMAN, BURKE, DICKENSON, DIVIDE, GRANT, MOUNTRAIL, SIOUX, STARK, WILLIAMS | GFND, GFND, MSU, NDSU, USDA | Map |
| Compositae | Hymenoxys richardsonii | , pingue rubberweed | BILLINGS, BOWMAN, DIVIDE, GOLDEN VALLEY, MCKENZIE, MORTON, SLOPE, STARK | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Solanaceae | Hyoscyamus niger | , black henbane | BILLINGS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MORTON, OLIVER | GFND, NDSU, NPWRC, USDA | Map |
| Hypericaceae | Hypericum boreale | RANSOM | NPWRC | Map | |
| Hypericaceae | Hypericum ellipticum | , pale St. Johnswort | USDA | Map | |
| Hypericaceae | Hypericum majus | , large St. Johnswort | BENSON, RANSOM, STUTSMAN | GFND, NPWRC, USDA | Map |
| Hypericaceae | Hypericum mutilum | GRAND FORKS | GFND | Map | |
| Hypericaceae | Hypericum perforatum | , common St. Johnswort | USDA | Map | |
| Hypoxidaceae | Hypoxis hirsuta | , common goldstar | BENSON, BURLEIGH, DICKEY, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, RANSOM, RICHLAND, SHERIDAN, STUTSMAN, WARD | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Balsaminaceae | Impatiens balsamifera | GRAND FORKS | GFND | Map | |
| Balsaminaceae | Impatiens capensis | , jewelweed | EDDY, GRAND FORKS, MCHENRY, RANSOM, RICHLAND, ROLETTE, STUTSMAN, WALSH | DK1995, GFND, GFND, NPWRC, NDSU, USDA | Map |
| Balsaminaceae | Impatiens pallida | , pale touch-me-not | GRAND FORKS | GFND, USDA | Map |
| Convolvulaceae | Ipomoea alba | EMMONS | NDSU | Map | |
| Convolvulaceae | Ipomoea hederacea | , ivyleaf morning-glory | LAMOURE | NDSU, USDA | Map |
| Convolvulaceae | Ipomoea purpurea | , tall morning-glory | CASS | NDSU, USDA | Map |
| Convolvulaceae | Ipomoea sloteri | CASS | NDSU, NDSU | Map | |
| Polemoniaceae | Ipomopsis congesta | , ballhead ipomopsis | BILLINGS, BOWMAN, MCKENZIE, SLOPE, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Iridaceae | Iris missouriensis | , Rocky Mountain iris | EMMONS, KIDDER, LOGAN | NDSU, USDA | Map |
| Isoetaceae | Isoetes eatonii | NDSU | Map | ||
| Compositae | Iva annua | , annual marsh elder | WALSH | NDSU, USDA | Map |
| Compositae | Iva axillaris | , povertyweed | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, LOGAN, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, SHERIDAN, SLOPE, STARK, WARD, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Juglandaceae | Juglans nigra | , black walnut | USDA | Map | |
| Juncaceae | Juncus alpinoarticulatus | , northern green rush | BOTTINEAU, BURKE, EMMONS, HETTINGER, KIDDER, STUTSMAN, WARD | NDSU, USDA | Map |
| Juncaceae | Juncus alpinus | EDDY, MCHENRY, STUTSMAN | DK1995, NPWRC | Map | |
| Juncaceae | Juncus ambiguus | BURLEIGH, DUNN, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LOGAN, SLOPE, STUTSMAN, WARD, WILLIAMS | NDSU | Map | |
| Juncaceae | Juncus arcticus | , arctic rush | BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, EMMONS, GOLDEN VALLEY, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON/ GRANT, MOUNTRAIL, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | NDSU, MSU, NDSU, USDA | Map |
| Juncaceae | Juncus articulatus | MORTON | GFND | Map | |
| Juncaceae | Juncus balticus | ADAMS, BARNES, BENSON, BOTTINEAU, CAVALIER, DICKEY, EDDY, FOSTER, GRAND FORKS, GRIGGS, KIDDER, MCHENRY, MOUNTRAIL, PIERCE, RAMSEY, RANSOM, RENVILLE, RICHLAND, ROLETTE, SARGENT, STARK, STEELE, STUTSMAN, TOWNER, WALSH | DK1995, GFND, NDSU, NPWRC | Map | |
| Juncaceae | Juncus brachycephalus | , smallhead rush | USDA | Map | |
| Juncaceae | Juncus brevicaudatus | , narrowpanicle rush | MCHENRY | GFND, USDA | Map |
| Juncaceae | Juncus bufonius | , toad rush | BARNES, BENSON, BOTTINEAU, BURKE, EDDY, GRAND FORKS, KIDDER, MORTON, NELSON, PEMBINA, RAMSEY, RANSOM, RENVILLE, RICHLAND, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Juncaceae | Juncus canadensis | GRAND FORKS | GFND | Map | |
| Juncaceae | Juncus compressus | , roundfruit rush | BURLEIGH, EMMONS | NDSU, USDA | Map |
| Juncaceae | Juncus dudleyi | , Dudley's rush | BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, HETTINGER, KIDDER, LAMOURE, MCINTOSH, MERCER, MORTON, MOUNTRAIL, STARK, STEELE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Juncaceae | Juncus effusus | , common rush | BENSON | GFND, USDA | Map |
| Juncaceae | Juncus ensifolius | , swordleaf rush | USDA | Map | |
| Juncaceae | Juncus gerardii | , saltmeadow rush | USDA | Map | |
| Juncaceae | Juncus interior | , inland rush | BILLINGS, BOWMAN, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRANT, GRANT-ADAMS, KIDDER, LOGAN, MCKENZIE, MCLEAD, MCLEAN, MERCER, MORTON, RANSOM, STUTSMAN, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Juncaceae | Juncus longistylis | , longstyle rush | BENSON, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, KIDDER, LOGAN, MCINTOSH, MOUNTRAIL, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Juncaceae | Juncus nodosus | , knotted rush | BENSON, BILLINGS, DICKEY, DIVIDE, EDDY, GRAND FORKS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MERCER, MOUNTRAIL, SHERIDAN, STARK, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Juncaceae | Juncus tenuis | , poverty rush | BENSON | GFND, USDA | Map |
| Juncaceae | Juncus torreyi | , Torrey's rush | ADAMS, BENSON, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, RICHLAND, SARGENT, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Juncaceae | Juncus vaseyi | , Vasey's rush | USDA | Map | |
| Cupressaceae | Juniperus communis | , common juniper | ADAMS, BILLINGS, BOWMAN, DUNN, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, SLOPE, STARK, WELLS, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Cupressaceae | Juniperus horizontalis | , creeping juniper | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, SIOUX, SLOPE, STARK, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cupressaceae | Juniperus scopulorum | , Rocky Mountain juniper | BARNES, BILLINGS, BOWMAN, CASS, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, MCKENZIE, MERCER, MOUNTRAIL, OLIVER, RAMSEY, SIOUX, SLOP, SLOPE, STARK, WILLIAMS | DK1995, GFND, GFND, NDSU, NPWRC, USDA | Map |
| Cupressaceae | Juniperus virginiana | , eastern redcedar | BILLINGS, GRAND FORKS, PEMBINA, RANSOM | GFND, NDSU, USDA | Map |
| Caprifoliaceae | Knautia arvensis | , field scabiosa | GRAND FORKS, PIERCE | NDSU, USDA | Map |
| Gramineae | Koeleria macrantha | , prairie Junegrass | ADAMS, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, PEMBINA, RAMSEY, RANSOM, RANSON, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Amaranthaceae | Krascheninnikovia lanata | , winterfat | BILLINGS, MCKENZIE, SIOUX, WARD, WILLIAMS | GFND, MSU, NPWRC, USDA | Map |
| Compositae | Kuhnia eupatorioides | EDDY, MERCER, RANSOM, STUTSMAN, WARD | DK1995, GFND, NPWRC | Map | |
| Compositae | Lactuca biennis | , tall blue lettuce | EDDY, GRAND FORKS, RANSOM, WALSH | DK1995, GFND, GFND, USDA | Map |
| Compositae | Lactuca canadensis | , Canada lettuce | BILLINGS, DUNN, EDDY, MCLEAN, OLIVER, ROLETTE, SLOPE | NDSU, NPWRC, USDA | Map |
| Compositae | Lactuca floridana | SHERIDAN | NDSU | Map | |
| Compositae | Lactuca ludoviciana | , biannual lettuce | BENSON, BURLEIGH, DICKEY, EDDY, GRANT, KIDDER, MCLEAN, SIOUX, SLOPE, STARK, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, USDA | Map |
| Compositae | Lactuca oblongifolia | BENSON, EDDY, FOSTER, MCHENRY, MERCER, MOUNTRAIL, RAMSEY, RANSOM, STUTSMAN, WARD | DK1995, GFND, NDSU, NPWRC | Map | |
| Compositae | Lactuca pulchella | BENSON, BILLINGS, GRAND FORKS, MERCER, MOUNTRAIL, RICHLAND, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | GFND, GFND, MSU | Map | |
| Compositae | Lactuca sativa | , garden lettuce | USDA | Map | |
| Compositae | Lactuca serriola | , prickly lettuce | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Lactuca tatarica | , blue lettuce | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | NDSU, USDA | Map |
| Labiatae | Lamium amplexicaule | , henbit deadnettle | STARK | NDSU, USDA | Map |
| Urticaceae | Laportea canadensis | , Canadian woodnettle | DICKEY, EDDY, GRAND FORKS, LAMOURE, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Boraginaceae | Lappula cenchrusoides | , Great Plains stickseed | BILLINGS, MCKENZIE, SIOUX, SLOPE, WILLIAMS | GFND, NDSU, USDA | Map |
| Boraginaceae | Lappula occidentalis | , flatspine stickseed | BENSON, BILLINGS, BURKE, GOLDEN VALLEY, LAMOURE, MOUNTRAIL, RANSOM, STUTSMAN, WARD | GFND, MSU, NDSU, USDA | Map |
| Boraginaceae | Lappula redowskii | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURLEIGH, CASS, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, PEMBINA, PIERCE, RAMSEY, RANSOM, RICHLAND, ROLETTE, SHERIDAN, SLOPE, STARK, STEELE, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NPWRC, NDSU | Map | |
| Boraginaceae | Lappula squarrosa | , European stickseed | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKEINZE, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, NELSON, OLIVER, PEMBINA, RAMSEY, RANSOM, RICHLAND, ROLETTE, SARGENT, SLOPE, STARK, STEELE, STUTSMAN, TOWNER, WALSH, WARD, WELLS, WILIIAMS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, USDA | Map |
| Compositae | Lapsana communis | , common nipplewort | USDA | Map | |
| Pinaceae | Larix laricina | CASS | GFND, NDSU | Map | |
| Leguminosae | Lathyrus ochroleucus | , cream pea | BENSON, BOTTINEAU, BURKE, EDDY, GRAND FORKS, MOUNTRAIL, OLIVER, RANSOM, ROLETTE, STARK, WALSH, WARD | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Lathyrus palustris | , marsh pea | BENSON, BURKE, DICKEY, EDDY, GRAND FORKS, LAMOURE, MCHENRY, MOUNTRAIL, RICHLAND | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Lathyrus venosus | , veiny pea | BENSON, BOTTINEAU, EDDY, GRAND FORKS, MORTON, RICHLAND, WALSH | DK1995, GFND, NPWRC, USDA | Map |
| Malvaceae | Lavatera cretica | DIVIDE | NDSU | Map | |
| Malvaceae | Lavatera thuringiaca | , tree lavatera | USDA | Map | |
| Cistaceae | Lechea intermedia | , largepod pinweed | USDA | Map | |
| Cistaceae | Lechea stricta | , prairie pinweed | USDA | Map | |
| Ericaceae | Ledum groenlandicum | , bog Labrador tea | USDA | Map | |
| Gramineae | Leersia oryzoides | , rice cutgrass | BURLEIGH, DICKEY, EDDY, GRAND FORKS, LAMOURE, MCINTOSH, MORTON, OLIVER, RANSOM, SLOPE, STUTSMAN, TRAILL, WARD | DK1995, GFND, MSU, NDSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Leersia virginica | , whitegrass | BURLEIGH, EMMONS, FOSTER, GRANT, MCINTOSH, RICHLAND, SIOUX, STARK, STUTSMAN | NDSU, NPWRC, USDA | Map |
| Araceae | Lemna minor | , common duckweed | BURLEIGH, DICKEY, EDDY, GRAND FORKS, LAMOURE, LOGAN, MCLEAN, MERCER, OLIVER, RAMSEY, ROLETTE, STUTSMAN, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Araceae | Lemna perpusilla | , minute duckweed | USDA | Map | |
| Araceae | Lemna trisulca | , star duckweed | BARNES, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCLEAN, MOUNTRAIL, RAMSEY, ROLETTE, SHERIDAN, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Araceae | Lemna turionifera | , turion duckweed | BARNES, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKINSON, DIVIDE, EMMONS, GRANT, MCKENZIE, MCLEAN, MERCER, NELSON, PEMBINA, SARGENT, STARK, STUTSMAN, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Labiatae | Leonurus cardiaca | , common motherwort | BURKE, BURLEIGH, CASS, EDDY, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, STUTSMAN, WALSH, WARD | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Cruciferae | Lepidium densiflorum | , common pepperweed | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Lepidium perfoliatum | , clasping pepperweed | BILLINGS, HETTINGER, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Cruciferae | Lepidium ramosissimum | , manybranched pepperweed | BENSON, BURKE, DUNN, GRAND FORKS, KIDDER, MCLEAN, MOUNTRAIL, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Lepidium sativum | , gardencress pepperweed | BILLINGS, WARD | GFND, MSU, USDA | Map |
| Cruciferae | Lepidium virginicum | , Virginia pepperweed | BENSON, HETTINGER, STUTSMAN | GFND, NDSU, USDA | Map |
| Gramineae | Leptochloa fascicularis | RANSOM | NPWRC | Map | |
| Gramineae | Leptochloa fusca | , Malabar sprangletop | BOWMAN, BURLEIGH, EMMONS, LAMOURE, MCINTOSH, SIOUX, SLOPE, WILLIAMS | MSU, NDSU, USDA | Map |
| Cruciferae | Lesquerella alpina | , alpine bladderpod | BILLINGS, BOWMAN, DUNN, GOLDEN VALLEY, MCKENZIE, MERCER, MORTON, SLOPE, STARK, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Cruciferae | Lesquerella arenosa | , Great Plains bladderpod | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, USDA | Map |
| Cruciferae | Lesquerella argentea | BILLINGS, GRAND FORKS | GFND | Map | |
| Cruciferae | Lesquerella ludoviciana | , foothill bladderpod | BILLINGS, DICKEY, EDDY, GRANT, MERCER, MOUNTRAIL, STUTSMAN, WARD | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Compositae | Leucanthemella serotina | CASS | NDSU | Map | |
| Compositae | Leucanthemum vulgare | , oxeye daisy | BENSON, CASS, EDDY, GRAND FORKS, RANSOM, RICHLAND, STARK, STUTSMAN | DK1995, GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Asparagaceae | Leucocrinum montanum | , common starlily | BOWMAN, GOLDEN VALLEY | NDSU, NPWRC, USDA | Map |
| Gramineae | Leymus arenarius | STARK | NDSU | Map | |
| Compositae | Liatris aspera | , tall blazing star | BARNES, BENSON, BURKE, DICKEY, EDDY, EMMONS, FOSTER, KIDDER, LAMOURE, RANSOM, RICHLAND | DK1995, GFND, NDSU, USDA | Map |
| Compositae | Liatris fallacior | USDA | Map | ||
| Compositae | Liatris ligulistylis | , Rocky Mountain blazing star | BARNES, BENSON, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCLEAN, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, SHERIDAN, STUTSMAN, TRAILL, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Liatris punctata | , dotted blazing star | BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERIDAN, SHERIDEN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Liatris pycnostachya | , prairie blazing star | MCKENZIE, RANSOM, RICHLAND | GFND, GFND, NDSU, NDSU, NPWRC, USDA | Map |
| Compositae | Liatris scariosa | BENSON, GRAND FORKS, RANSOM, RICHLAND | GFND | Map | |
| Liliaceae | Lilium lancifolium | , tiger lily | USDA | Map | |
| Liliaceae | Lilium philadelphicum | , wood lily | BARNES, BENSON, BOTTINEAU, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, NELSON, OLIVER, RAMSEY, RANSOM, SHERIDAN, STUTSMAN, STUTUSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Liliaceae | Lilium umbellatum | BENSON | GFND | Map | |
| Scrophulariaceae | Limosella aquatica | , water mudwort | BILLINGS, BURKE, STUTSMAN, WARD | GFND, MSU, NPWRC, USDA | Map |
| Polemoniaceae | Linanthus androsaceus | WARD | NDSU | Map | |
| Plantaginaceae | Linaria dalmatica | , Dalmatian toadflax | USDA | Map | |
| Plantaginaceae | Linaria vulgaris | , butter and eggs | BENSON, BURKE, DICKEY, EDDY, FOSTER, GRAND FORKS, LAMOURE, LOGAN, MCHENRY, MCINTOSH, RANSOM, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Linderniaceae | Lindernia anagallidea | MCINTOSH, RANSOM | GFND, NDSU | Map | |
| Linderniaceae | Lindernia dubia | , yellowseed false pimpernel | USDA | Map | |
| Caprifoliaceae | Linnaea borealis | , twinflower | CAVALIER, DUNN | GFND, NDSU, NPWRC, USDA | Map |
| Linaceae | Linum compactum | , Wyoming flax | USDA | Map | |
| Linaceae | Linum lewisii | , Lewis flax | BENSON, BILLINGS, BOWMAN, BURKE, CAVALIER, GRAND FORKS, MOUNTRAIL, SLOPE, WARD, WILLIAMS | GFND, MSU, USDA | Map |
| Linaceae | Linum perenne | BENSON, DUNN, EDDY, RAMSEY | DK1995, GFND, NPWRC | Map | |
| Linaceae | Linum rigidum | , stiffstem flax | BENSON, BILLINGS, BURKE, EDDY, GRAND FORKS, RICHLAND, SLOPE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Linaceae | Linum sulcatum | , grooved flax | BENSON, BOWMAN, CAVALIER, EDDY, GRAND FORKS, MORTON, RAMSEY, RANSOM, STUTSMAN, WILLIAMS | DK1995, GFND, NPWRC, USDA | Map |
| Linaceae | Linum usitatissimum | , common flax | EDDY, GRAND FORKS, RICHLAND | DK1995, GFND, USDA | Map |
| Orchidaceae | Liparis loeselii | , yellow widelip orchid | KIDDER | GFND, NDSU, USDA | Map |
| Cyperaceae | Lipocarpha drummondii | , Drummond's halfchaff sedge | DICKEY, SARGENT | NPWRC, NDSU, USDA | Map |
| Cyperaceae | Lipocarpha micrantha | , smallflower halfchaff sedge | USDA | Map | |
| Boraginaceae | Lithospermum album | GRAND FORKS | GFND | Map | |
| Boraginaceae | Lithospermum canescens | , hoary puccoon | BARNES, BENSON, BOTTINEAU, BURKE, CASS, CAVALIER, DICKEY, EDDY, EMMONS, FOSTER, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, NELSON, OLIVER, PEMBINA, PIERCE, RAMSEY, RANSOM, RENVILLE, RICHLAND, ROLETTE, SARGENT, SIOUX, STEELE, STUTSMAN, TRAILL, WALSH, WARD, WELLS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Boraginaceae | Lithospermum incisum | , narrowleaf stoneseed | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, PEMBINA, PIERCE, RAMSEY, RANSOM, RENVILLE, RICHLAND, SIOUX, SLOPE, STARK, STEELE, STUSMAN, STUTSMAN, TOWNER, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Campanulaceae | Lobelia erinus | CASS | NDSU | Map | |
| Campanulaceae | Lobelia kalmii | , Ontario lobelia | BARNES, BENSON, BOTTINEAU, BURKE, DIVIDE, EDDY, EMMONS, GRAND FORKS, KIDDER, LOGAN, MCHENRY, MOUNTRAIL, PEMBINA, RANSOM, RICHLAND, STUTSMAN | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Campanulaceae | Lobelia siphilitica | , great blue lobelia | BARNES-RANSOM, CASS, DICKEY, RANSOM, RICHLAND | GFND, NDSU, NDSU, NPWRC, USDA | Map |
| Campanulaceae | Lobelia spicata | , palespike lobelia | BARNES, BENSON, BOTTINEAU, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, EDDY, EMMONS, FOSTER, GRAND FORKS, GRIGGS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MOUNTRAIL, PEMBINA, PIERCE, RAMSEY, RANSOM, RICHLAND, SARGENT, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Lobularia maritima | GRAND FORKS | GFND | Map | |
| Gramineae | Lolium multiflorum | RAMSAY | GFND | Map | |
| Gramineae | Lolium perenne | , perennial ryegrass | CASS, MOUNTRAIL, STUTSMAN | MSU, NDSU, USDA | Map |
| Gramineae | Lolium persicum | , Persian ryegrass | BURKE, BURLEIGH, DIVIDE, GOLDEN VALLEY, MCLEAN, MOUNTRAIL, SHERIDAN, SLOPE, STARK, TOWNER, WILLIAMS | MSU, NDSU, USDA | Map |
| Gramineae | Lolium temulentum | , Darnel ryegrass | STARK | NDSU, USDA | Map |
| Umbelliferae | Lomatium cous | , cous biscuitroot | USDA | Map | |
| Umbelliferae | Lomatium foeniculaceum | , desert biscuitroot | BARNES, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MORTON, MORTON/SIOUX, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Umbelliferae | Lomatium macrocarpum | , bigseed biscuitroot | BURKE, MOUNTRAIL, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Umbelliferae | Lomatium nudicaule | GRAND FORKS | GFND | Map | |
| Umbelliferae | Lomatium orientale | , Northern Idaho biscuitroot | BENSON, BILLINGS, BURKE, DICKEY, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MCINTOSH, MCLEAN, MOUNTRAIL, OLIVER, STUTSMAN, WARD, WILLIAMS | GFND, DK1995, MSU, NDSU, NPWRC, USDA | Map |
| Caprifoliaceae | Lonicera dioica | , limber honeysuckle | BARNES, BARNES-RANSOM LINE, BENSON, BOTTINEAU, CASS, CAVALIER, DUNN, EDDY, EMMONS, GRAND FORKS, GRIGGS, MCHENRY, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PEMBINA, PEMBINE, RANSOM, RICHLAND, ROLETTE, STEELE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Caprifoliaceae | Lonicera japonica | BOTTINEAU | NDSU | Map | |
| Caprifoliaceae | Lonicera kowalkowski | CASS | NDSU | Map | |
| Caprifoliaceae | Lonicera maackii | , Amur honeysuckle | CASS | NDSU, USDA | Map |
| Caprifoliaceae | Lonicera morrowii | GRAND FORKS | GFND | Map | |
| Caprifoliaceae | Lonicera tatarica | , Tatarian honeysuckle | BARNES, BURKE, BURLEIGH, CASS, DIVIDE, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, RANSOM, RICHLAND, SARGENT, STUTSMAN, TRAILL, WALSH, WARD | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Lotus americanus | BENSON | GFND | Map | |
| Leguminosae | Lotus corniculatus | , bird's-foot trefoil | GRAND FORKS, LAMOURE, MORTON, RANSOM, STUTSMAN | GFND, NDSU, USDA | Map |
| Leguminosae | Lotus purshianus | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WILLIAMS | DK1995, GFND, GFND, NDSU, NPWRC | Map | |
| Leguminosae | Lotus unifoliolatus | , American bird's-foot trefoil | BURKE, DIVIDE, WARD | MSU, USDA | Map |
| Leguminosae | Lupinus argenteus | , silvery lupine | BOWMAN, HETTINGER | GFND, MSU, NPWRC, USDA | Map |
| Leguminosae | Lupinus parviflorus | , lodgepole lupine | USDA | Map | |
| Leguminosae | Lupinus pusillus | , rusty lupine | BILLINGS, BOWMAN, GOLDEN VALLEY, SIOUX, SLOPE, WALSH | GFND, GFND, NPWRC, USDA | Map |
| Juncaceae | Luzula parviflora | , smallflowered woodrush | USDA | Map | |
| Caryophyllaceae | Lychnis chalcedonica | , maltesecross | DICKEY, MCINTOSH | NDSU, USDA | Map |
| Solanaceae | Lycium barbarum | , matrimony vine | USDA | Map | |
| Labiatae | Lycopus americanus | , American water horehound | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, ROLETTE, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Lycopus asper | , rough bugleweed | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, RANSOM, ROLETTE, SARGENT, SHERIDAN, SLOPE, STARK, STUSTMAN, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Lycopus uniflorus | , northern bugleweed | STUTSMAN | NDSU, NPWRC, USDA | Map |
| Compositae | Lygodesmia juncea | , rush skeletonplant | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Primulaceae | Lysimachia ciliata | , fringed loosestrife | BARNES, BENSON, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, ROLETTE, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Primulaceae | Lysimachia hybrida | , lowland yellow loosestrife | BENSON, BURKE, DICKEY, DIVIDE, FOSTER, KIDDER, LAMOURE, LOGAN, RANSOM, STUTSMAN, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Primulaceae | Lysimachia quadriflora | , fourflower yellow loosestrife | GRAND FORKS, RANSOM | GFND, GFND, NPWRC, USDA | Map |
| Primulaceae | Lysimachia thyrsiflora | , tufted loosestrife | EDDY, GRAND FORKS, RENVILLE, ROLETTE, STUTSMAN, WARD | DK1995, GFND, MSU, NPWRC, NPWRC, USDA | Map |
| Primulaceae | Lysimachia verticillata | GRAND FORKS | GFND | Map | |
| Lythraceae | Lythrum alatum | , winged lythrum | RANSOM, RICHLAND | NDSU, USDA | Map |
| Lythraceae | Lythrum salicaria | , purple loosestrife | BURLEIGH, CASS, RICHLAND, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Machaeranthera canescens | , hoary tansyaster | BILLINGS, BOWMAN, BURKE, DIVIDE, EMMONS, GOLDEN VALLEY, GRANT, MCKENZIE, MERCER, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, WILLIAMS | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Machaeranthera grindelioides | , rayless tansyaster | BILLINGS, BOWMAN, DIVIDE, GOLDEN VALLEY, MCKENZIE, MOUNTRAIL, SLOPE, STARK, WILLIAMS | GFND, NDSU, MSU, NDSU, USDA | Map |
| Compositae | Machaeranthera pinnatifida | , lacy tansyaster | BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, SARGENT, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Madia glomerata | , mountain tarweed | USDA | Map | |
| Berberidaceae | Mahonia repens | , creeping barberry | USDA | Map | |
| Asparagaceae | Maianthemum canadense | , Canada mayflower | BOTTINEAU, EDDY, GRAND FORKS, MCLEAN, ROLLETTE, WALSH | GFND, NPWRC, NDSU, USDA | Map |
| Asparagaceae | Maianthemum racemosum | , feathery false lily of the valley | USDA | Map | |
| Asparagaceae | Maianthemum stellatum | , starry false lily of the valley | BILLINGS, BOTTINEAU, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RICHLAND, ROLETTE, SIOUX, SLOPE, STARK, STUTSMAN, TRAILL, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NPWRC, NDSU, USDA | Map |
| Malvaceae | Malva alcea | GRAND FORKS | GFND | Map | |
| Malvaceae | Malva moschata | GRAND FORKS | GFND | Map | |
| Malvaceae | Malva neglecta | , common mallow | BENSON, BILLINGS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, STARK, STUTSMAN, TRAILL | DK1995, GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Malvaceae | Malva parviflora | , cheeseweed mallow | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, EMMONS, GOLDEN VALLEY, GRANT, LAMOURE, LOGAN, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STUTSMAN, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Malvaceae | Malva pusilla | , low mallow | WARD | MSU, USDA | Map |
| Malvaceae | Malva sylvestris | , high mallow | GRAND FORKS, LAMOURE, MCKENZIE, SHERIDAN, STUTSMAN | GFND, NDSU, USDA | Map |
| Malvaceae | Malva verticillata | , cluster mallow | BURLEIGH, KIDDER | NDSU, USDA | Map |
| Marsileaceae | Marsilea vestita | , hairy waterclover | BENSON, BILLINGS, BURKE, EDDY, KIDDER, STUTSMAN, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Matricaria discoidea | , disc mayweed | BARNES, BURKE, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, HETTINGER, KIDDER, LAMOURE, MCINTOSH, MCLEON, MORTON, MOUNTRAIL, RAMSEY, RANSOM, SHERIDAN, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, NDSU, USDA | Map |
| Compositae | Matricaria maritima | CASS, RAMSEY, WALSH | GFND, NDSU | Map | |
| Compositae | Matricaria recutita | , German chamomile | CAVALIER, EMMONS, GRAND FORKS, LOGAN, MORTON, NELSON, SHERIDAN, WARD | GFND, NPWRC, NDSU, USDA | Map |
| Polypodiaceae | Matteuccia struthiopteris | , ostrich fern | PEMBINA, RICHLAND | NDSU, NPWRC, USDA | Map |
| Leguminosae | Medicago lupulina | , black medick | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Medicago sativa | , alfalfa | ADAMS, BARNES, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GOLDEN VALLLEY, GRAND FORKS, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Melilotus officinalis | , sweetclover | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, DK1995, GFND, MSU, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Menispermaceae | Menispermum canadense | , common moonseed | RICHLAND, SHERIDAN | GFND, NDSU, NPWRC, USDA | Map |
| Labiatae | Mentha arvensis | , wild mint | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, RANSOM, RICHLAND, ROLETTE, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Mentha spicata | GRAND FORKS | GFND | Map | |
| Loasaceae | Mentzelia decapetala | , tenpetal blazingstar | BILLINGS, BOWMAN, BURLEIGH, DUNN, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SLOPE, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Loasaceae | Mentzelia dispersa | , bushy blazingstar | SLOPE | GFND, USDA | Map |
| Loasaceae | Mentzelia oligosperma | RANSOM | GFND | Map | |
| Loasaceae | Mentzelia pumila | , dwarf mentzelia | SLOPE | NDSU, USDA | Map |
| Menyanthaceae | Menyanthes trifoliata | , buckbean | BOTTINEAU, MCHENRY, RANSOM | GFND, NPWRC, USDA | Map |
| Boraginaceae | Mertensia lanceolata | , prairie bluebells | BILLINGS, BOTTINEAU, BOWMAN, BURKE, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Boraginaceae | Mertensia oblongifolia | , oblongleaf bluebells | USDA | Map | |
| Leguminosae | Mimosa nuttallii | , Nuttall's sensitive-briar | USDA | Map | |
| Phrymaceae | Mimulus geyeri | GRAND FORKS | GFND | Map | |
| Phrymaceae | Mimulus glabratus | , roundleaf monkeyflower | EDDY, GRAND FORKS, RANSOM, STUTSMAN | DK1995, GFND, NPWRC, USDA | Map |
| Phrymaceae | Mimulus guttatus | , seep monkeyflower | GRAND FORKS | GFND, USDA | Map |
| Phrymaceae | Mimulus ringens | , Allegheny monkeyflower | EDDY, GRAND FORKS, LAMOURE, RANSOM, STUTSMAN | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Caryophyllaceae | Minuartia dawsonensis | , rock stitchwort | USDA | Map | |
| Nyctaginaceae | Mirabilis albida | , white four o'clock | BILLINGS, GOLDEN VALLEY, STARK | NDSU, USDA | Map |
| Nyctaginaceae | Mirabilis hirsuta | , hairy four o'clock | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, GRAND FORKS, GRANT, KIDDER, LAMOURE, MCHENRY, MCKENZIE, MERCER, MORTON, MOUNTRAIL, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Nyctaginaceae | Mirabilis linearis | , narrowleaf four o'clock | BILLINGS, DUNN, GOLDEN VALLEY, GRANT, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, SLOPE, STARK, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Nyctaginaceae | Mirabilis nyctaginea | , heartleaf four o'clock | BARNES, BILLINGS, BURKE, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Saxifragaceae | Mitella nuda | , naked miterwort | CAVALIER, PEMBINA | GFND, GFND, USDA | Map |
| Caryophyllaceae | Moehringia lateriflora | , bluntleaf sandwort | BILLINGS, BURKE, BURLEIGH, CASS, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LOGAN, MCHENRY, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NPWRC, NDSU, USDA | Map |
| Molluginaceae | Mollugo verticillata | , green carpetweed | STUTSMAN | NDSU, USDA | Map |
| Cucurbitaceae | Momordica balsamina | CASS | NDSU | Map | |
| Labiatae | Monarda bradburiana | GFND | Map | ||
| Labiatae | Monarda fistulosa | , wild bergamot | ADAMS, BENSON, BILLINGS, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS, WILLISTON | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Monarda mollis | BOTTINEAU | GFND | Map | |
| Amaranthaceae | Monolepis nuttalliana | , Nuttall's povertyweed | BENSON, BILLINGS, BOWMAN, BURKE, DICKEY, DIVIDE, EMMONS, GRANT, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ericaceae | Monotropa uniflora | , Indianpipe | DUNN, ROLETTE | GFND, NDSU, NPWRC, USDA | Map |
| Moraceae | Morus alba | , white mulberry | USDA | Map | |
| Gramineae | Muhlenbergia asperifolia | , scratchgrass | ADAMS, BARNES, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, RAMSEY, SLOPE, STEELE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Muhlenbergia cuspidata | , plains muhly | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, LOGRAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Muhlenbergia filiculmis | , slimstem muhly | USDA | Map | |
| Gramineae | Muhlenbergia filiformis | , pullup muhly | BURKE | NDSU, USDA | Map |
| Gramineae | Muhlenbergia frondosa | , wirestem muhly | LAMOURE | GFND, NDSU, USDA | Map |
| Gramineae | Muhlenbergia glomerata | , spiked muhly | EDDY, KIDDER, MCHENRY, RICHLAND, STUTSMAN | DK1995, NDSU, NPWRC, USDA | Map |
| Gramineae | Muhlenbergia mexicana | , Mexican muhly | DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, RAMSEY, RANSOM, SHERIDAN, STUTSMAN | DK1995, GFND, NDSU, USDA | Map |
| Gramineae | Muhlenbergia minutissima | DIVIDE | MSU | Map | |
| Gramineae | Muhlenbergia racemosa | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENIZE, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map | |
| Gramineae | Muhlenbergia richardsonis | , mat muhly | BARNES, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MORTON, MOUNTRAIL, OLIVER, SIOUX, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Munroa squarrosa | , false buffalograss | BILLINGS, EMMONS, GRANT, SLOPE, STARK | NDSU, USDA | Map |
| Umbelliferae | Musineon divaricatum | BILLINGS, BOWMAN, BURLEIGH, DUNN, MCKENZIE, MOUNTRAIL, SHERIDAN, SLOPE, STARK, WARD, WILLIAMS | GFND, MSU, MSU, NDSU, NPWRC | Map | |
| Ranunculaceae | Myosurus apetalus | , bristly mousetail | DIVIDE, KIDDER, MORTON, SLOPE, STARK, WARD, WILLIAMS | NDSU, USDA | Map |
| Ranunculaceae | Myosurus minimus | , tiny mousetail | DIVIDE, MORTON/SIOUX | MSU, USDA | Map |
| Haloragaceae | Myriophyllum heterophyllum | , twoleaf watermilfoil | BOTTINEAU, MCHENRY | GFND, USDA | Map |
| Haloragaceae | Myriophyllum pinnatum | LAMOURE, LOGAN, STUTSMAN | NDSU, NPWRC, USDA | Map | |
| Haloragaceae | Myriophyllum sibiricum | , shortspike watermilfoil | EDDY, RAMSEY | DK1995, GFND, USDA | Map |
| Haloragaceae | Myriophyllum spicatum | , Eurasian watermilfoil | BENSON, CAVALIER, ROLETTE, STUTSMAN | GFND, NPWRC, USDA | Map |
| Haloragaceae | Myriophyllum verticillatum | , whorl-leaf watermilfoil | BOTTINEAU, GRAND FORKS, STUTSMAN | GFND, NPWRC, USDA | Map |
| Hydrocharitaceae | Najas flexilis | , nodding waternymph | SLOPE, STUTSMAN | NDSU, USDA | Map |
| Hydrocharitaceae | Najas guadalupensis | , southern waternymph | EMMONS | NDSU, USDA | Map |
| Hydrocharitaceae | Najas marina | , spiny naiad | USDA | Map | |
| Polemoniaceae | Nama jamaicense | CASS | NDSU | Map | |
| Gramineae | Nassella viridula | , green needlegrass | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, TOWNER, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Polemoniaceae | Navarretia intertexta | BILLINGS, BURLEIGH, GRANT, HETTINGER, KIDDER, MCKENZIE, MORTON, MOUNTRAIL, WARD, WILLIAMS | NPWRC, MSU, NDSU | Map | |
| Labiatae | Nepeta cataria | , catnip | BENSON, BILLINGS, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WARREN, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Neslia paniculata | , ballmustard | RENVILLE | MSU, USDA | Map |
| Compositae | Nothocalais cuspidata | , prairie false dandelion | BILLINGS, BOWMAN, BURKE, BURLEIGH, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, OLIVER, RANSOM, SLOPE, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, USDA | Map |
| Nymphaeaceae | Nuphar advena | GRAND FORKS | GFND | Map | |
| Nymphaeaceae | Nuphar lutea | , yellow pond-lily | BURLEIGH, EMMONS, LOGAN, MCINTOSH, STUTSMAN | NDSU, USDA | Map |
| Nymphaeaceae | Nuphar luteum | BOTTINEAU, STUTSMAN | NPWRC | Map | |
| Nymphaeaceae | Nuphar variegatum | GFND | Map | ||
| Plantaginaceae | Nuttallanthus canadensis | , Canada toadflax | MORTON | NDSU, USDA | Map |
| Plantaginaceae | Nuttallanthus texanus | , Texas toadflax | USDA | Map | |
| Nymphaeaceae | Nymphaea tuberosa | GFND | Map | ||
| Onagraceae | Oenothera albicaulis | , whitest evening primrose | ADAMS, BILLINGS, BOWMAN, DUNN, GRANT, MCKENZIE, SIOUX, SLOPE, STARK, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Onagraceae | Oenothera biennis | , common evening primrose | GRAND FORKS, OLIVER, STUTSMAN, WALSH, WARD | GFND, MSU, NPWRC, USDA | Map |
| Onagraceae | Oenothera caespitosa | , tufted evening primrose | BILLINGS, DIVIDE, GOLDEN VALLEY, MCKENZIE, MERCER, MOUNTRAIL, SHERIDAN, SLOPE, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Onagraceae | Oenothera flava | , yellow evening primrose | DIVIDE, HETTINGER, MOUNTRAIL, SLOPE, STARK | MSU, NDSU, USDA | Map |
| Onagraceae | Oenothera laciniata | , cutleaf evening primrose | BILLINGS, GRANT, MCHENRY | GFND, NDSU, USDA | Map |
| Onagraceae | Oenothera nuttallii | , Nuttall's evening primrose | BILLINGS, BOWMAN, BURKE, BURLEIGH, DUNN, EDDY, EMMONS, GRAND FORKS, HETTINGER, KIDDER, MCHENRY, MCKENZIE, MCLEAN, MOUNTRAIL, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Onagraceae | Oenothera pallida | BENSON, GRAND FORKS, MCHENRY | GFND | Map | |
| Onagraceae | Oenothera rhombipetala | , fourpoint evening primrose | GRAND FORKS | GFND, USDA | Map |
| Onagraceae | Oenothera serrulata | MCLEAN | GFND | Map | |
| Onagraceae | Oenothera strigosa | BENSON, GRAND FORKS, PEMBINA, RICHLAND | GFND | Map | |
| Onagraceae | Oenothera villosa | , hairy evening primrose | BURKE, EDDY, WARD | DK1995, MSU, USDA | Map |
| Compositae | Oligoneuron album | , prairie goldenrod | ADAMS, BARNES, BENSON, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RENVILLE, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Oligoneuron riddellii | , Riddell's goldenrod | USDA | Map | |
| Leguminosae | Onobrychis viciifolia | STUTSMAN | NPWRC | Map | |
| Polypodiaceae | Onoclea sensibilis | , sensitive fern | RICHLAND | NPWRC, USDA | Map |
| Boraginaceae | Onosmodium bejariense | , soft-hair marbleseed | BARNES, BENSON, BOTTINEAU, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, RANSOM, RICHLAND, SARGENT, SIOUX, STARK, STEELE, STUTMAN, STUTSMAN, WALSH, WARD, WELLS | DK1995, GFND, MSU, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Ophioglossaceae | Ophioglossum pusillum | , northern adderstongue | RANSOM | GFND, USDA | Map |
| Cactaceae | Opuntia fragilis | , brittle pricklypear | BARNES, BILLINGS, BOWMAN, BURKE, BURLEIGH, GRIGGS, MCHENRY, MERCER, MOUNTRAIL, PIERCE, STARK, STUTSMAN, WARD, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Cactaceae | Opuntia polyacantha | , plains pricklypear | BILLINGS, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, WILLIAMS | GFND, MSU, NPWRC, NDSU, USDA | Map |
| Cactaceae | Opuntia tortispina | MCKENZIE | GFND | Map | |
| Orobanchaceae | Orobanche fasciculata | , clustered broomrape | BARNES, BOWMAN, BURKE, EDDY, FOSTER, RAMSEY, SLOPE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Orobanchaceae | Orobanche ludoviciana | , Louisiana broomrape | EDDY, GRAND FORKS, MCHENRY, PEMBINA, RANSOM, WARD, WILLIAMS | DK1995, MSU, NDSU, USDA | Map |
| Orobanchaceae | Orobanche uniflora | , oneflowered broomrape | USDA | Map | |
| Ericaceae | Orthilia secunda | , sidebells wintergreen | BILLINGS, DUNN, GRAND FORKS | GFND, NDSU, USDA | Map |
| Orobanchaceae | Orthocarpus luteus | , yellow owl's-clover | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Oryzopsis asperifolia | , roughleaf ricegrass | BILLINGS, BOTTINEAU, DUNN, GRAND FORKS, RAMSEY | GFND, GFND, NDSU, USDA | Map |
| Gramineae | Oryzopsis micantha | GFND | Map | ||
| Umbelliferae | Osmorhiza claytonii | , Clayton's sweetroot | GRAND FORKS | GFND, USDA | Map |
| Umbelliferae | Osmorhiza longistylis | , longstyle sweetroot | BOTTINEAU, BURKE, EDDY, GRAND FORKS, GRIGGS, RICHLAND, ROLETTE, STUTSMAN, WARD | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Betulaceae | Ostrya virginiana | , hophornbeam | GRAND FORKS, MCLEAN, RANSOM, RICHLAND, WALSH | GFND, NDSU, NPWRC, USDA | Map |
| Oxalidaceae | Oxalis corniculata | , creeping woodsorrel | GFND, USDA | Map | |
| Oxalidaceae | Oxalis dillenii | , slender yellow woodsorrel | GRAND FORKS | GFND, USDA | Map |
| Oxalidaceae | Oxalis stricta | , common yellow oxalis | BENSON, BILLINGS, BURKE, DICKEY, EDDY, GRAND FORKS, MCHENRY, STUTSMAN, WALSH, WARD | GFND, DK1995, GFND, MSU, NPWRC, USDA | Map |
| Oxalidaceae | Oxalis violacea | , violet woodsorrel | RICHLAND, SARGENT | GFND, GFND, NPWRC, USDA | Map |
| Leguminosae | Oxytropis campestris | , field locoweed | BILLINGS, BOTTINEAU, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Leguminosae | Oxytropis deflexa | , nodding locoweed | BOTTINEAU | MSU, USDA | Map |
| Leguminosae | Oxytropis dispar | BENSON | GFND | Map | |
| Leguminosae | Oxytropis lambertii | , purple locoweed | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Oxytropis monticola | , yellowflower locoweed | MCHENRY, MCLEAN, MOUNTRAIL, WARD | MSU, USDA | Map |
| Leguminosae | Oxytropis riparia | , Oxus locoweed | USDA | Map | |
| Leguminosae | Oxytropis splendens | , showy locoweed | BENSON, BURKE, DIVIDE, GRAND FORKS, GRIGGS, STARK | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Packera aurea | GRAND FORKS, STUTSMAN | GFND, NDSU | Map | |
| Compositae | Packera cana | , woolly groundsel | BENSON, BILLIINGS, BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, FOSTER, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Packera paupercula | , balsam groundsel | DICKEY, GRAND FORKS, RANSOM | GFND, NDSU, NDSU, USDA | Map |
| Compositae | Packera plattensis | , prairie groundsel | BENSON, BILLINGS, BURKE, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Packera pseudaurea | , falsegold groundsel | BENSON, BILLINGS, CASS, EDDY, EMMONS, KIDDER, LOGAN, MCINTOSH, STUTSMAN, WARD, WELLS | DK1995, GFND, NPWRC, NDSU, USDA | Map |
| Compositae | Packera tridenticulata | , threetooth ragwort | USDA | Map | |
| Gramineae | Panicum capillare | , witchgrass | BARNES, BENSON, BILLINGS, BURKE, BURLEIGH, BURLIEGH, CASS, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RANSOM, SLOPE, STARK, STUTSMAN, TRAILL, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Panicum flexile | , wiry panicgrass | USDA | Map | |
| Gramineae | Panicum miliaceum | , proso millet | BENSON, CASS, DICKEY, GRANT, LAMOURE, MCKENZIE, MERCER, SARGENT, WARD, WILLIAMS | GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Panicum oligosanthes | BOWMAN, CASS, RICHLAND | NDSU, NPWRC | Map | |
| Gramineae | Panicum virgatum | , switchgrass | ADAMS, BENSON, BILLINGS, BOWMAN, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MERCER, MORTON, MOUNTRAIL, RAMSEY, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, TRAILL, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Papaveraceae | Papaver rhoeas | , corn poppy | USDA | Map | |
| Papaveraceae | Papaver somniferum | , opium poppy | BENSON | GFND, USDA | Map |
| Urticaceae | Parietaria pensylvanica | , Pennsylvania pellitory | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SLOPE, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NDSU, NPWRC, USDA | Map |
| Celastraceae | Parnassia caroliniana | RANSOM | GFND | Map | |
| Celastraceae | Parnassia glauca | , fen grass of Parnassus | EDDY | DK1995, USDA | Map |
| Celastraceae | Parnassia palustris | , marsh grass of Parnassus | BENSON, BURKE, DIVIDE, EDDY, KIDDER, MOUNTRAIL, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Caryophyllaceae | Paronychia sessiliflora | , creeping nailwort | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, GOLDEN VALLEY, GRANT, KIDDER, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SLOPE, STARK, WARD, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Vitaceae | Parthenocissus inserta | GRAND FORKS, STUTSMAN | GFND, NPWRC | Map | |
| Vitaceae | Parthenocissus quinquefolia | GFND | Map | ||
| Vitaceae | Parthenocissus vitacea | , woodbine | BILLINGS, BOWMAN, BURLEIGH, DICKEY, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Pascopyrum smithii | , western wheatgrass | ADAMS, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, PIERCE, RAMSEY, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, TOWNER, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Umbelliferae | Pastinaca sativa | , wild parsnip | BENSON, GRAND FORKS, STUTSMAN | GFND, NPWRC, USDA | Map |
| Orobanchaceae | Pedicularis canadensis | , Canadian lousewort | GRAND FORKS, RAMSEY, RICHLAND | GFND, NDSU, NPWRC, USDA | Map |
| Orobanchaceae | Pedicularis lanceolata | , swamp lousewort | BARNES, BENSON, CASS, EDDY, GRIGGS, MCHENRY, PEMBINA, PIERCE, RANSOM, RICHLAND, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Leguminosae | Pediomelum argophyllum | , silverleaf Indian breadroot | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GOLDEN VALLLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Leguminosae | Pediomelum esculentum | , large Indian breadroot | BENSON, BILLINGS, BILLINGS1, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NPWRC, NDSU, USDA | Map |
| Polypodiaceae | Pellaea glabella | , smooth cliffbrake | ADAMS, BOWMAN, DUNN, GOLDEN VALLEY, GRANT, HETTINGER, MCKENZIE, MORTON, OLIVER | GFND, NDSU, USDA | Map |
| Gramineae | Pennisetum glaucum | , pearl millet | USDA | Map | |
| Plantaginaceae | Penstemon albidus | , white penstemon | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, PEMBINA, PIERCE, RAMSEY, RANSOM, RENVILLE, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STEELE, STUTSMAN, TOWNER, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Penstemon angustifolius | , broadbeard beardtongue | BARNES, BILLINGS, BOTTINEAU, BOWMAN, BURLEIGH, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LOGAN, MCKENZIE, MERCER, SIOUX, SLOPE, STARK, STUTSMAN | GFND, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Penstemon digitalis | EMMONS | GFND | Map | |
| Plantaginaceae | Penstemon eriantherus | , fuzzytongue penstemon | BILLINGS, BOWMAN, BURKE, BURLEIGH, DUNN, EMMONS, GOLDEN VALLEY, GRANT, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SIOUX, SLOPE, STARK, WARD, WILLIAMS | GFND, MSU, MSU, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Penstemon glaber | , sawsepal penstemon | MORTON, WILLIAMS | MSU, NDSU, USDA | Map |
| Plantaginaceae | Penstemon gracilis | , lilac penstemon | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, PIERCE, RAMSEY, RANSOM, RENVILLE, RICHLAND, ROLETTE, SARGENT, SIOUX, SLOPE, STARK, STEELE, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Penstemon grandiflorus | , large beardtongue | BARNES, BURLEIGH, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, LAMOURE, MCLEAN, MERCER, MORTON, RANSOM, RICHLAND, SIOUX | GFND, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Penstemon nitidus | , waxleaf penstemon | BILLINGS, BOWMAN, BURLEIGH, CAVALIER, DIVIDE, DUNN, GOLDEN VALLEY, GRANT, MCKENZIE, MERCER, MORTON, MOUNTRAIL, SLOPE, WILLIAM, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Penstemon procerus | , littleflower penstemon | BURKE | MSU, NDSU, USDA | Map |
| Haloragaceae | Penthorum sedoides | , ditch stonecrop | GRAND FORKS, RANSOM | GFND, USDA | Map |
| Leguminosae | Petalostemum candidum | BENSON, BILLINGS, DICKEY, GRAND FORKS, MCKENZIE, RANSOM, RICHLAND, SLOPE, STUTSMAN | GFND, GFND, MSU, NPWRC | Map | |
| Leguminosae | Petalostemum purpureum | BARNES, BILLINGS, DICKEY, DICKY, FOSTER, GRAND FORKS, KIDDER, MCHENRY, RANSOM, RICHLAND, SLOPE, STUTSMAN | GFND, GFND, MSU, NPWRC | Map | |
| Leguminosae | Petalostemum villosum | MCHENRY, RANSOM, RICHLAND, WILLIAMS | GFND, GFND, MSU | Map | |
| Compositae | Petasites frigidus | , arctic sweet coltsfoot | USDA | Map | |
| Compositae | Petasites sagittatus | CAVALIER, MCHENRY, PIERCE, ROLETTE | GFND, NDSU, NPWRC | Map | |
| Solanaceae | Petunia hybrida | GRAND FORKS | GFND | Map | |
| Boraginaceae | Phacelia hastata | , silverleaf phacelia | BILLINGS | NDSU, NPWRC, USDA | Map |
| Gramineae | Phalaris arundinacea | , reed canarygrass | BARNES, BENSON, BOTTINEAU, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERIDAN, STARK, STUTSMAN, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Phalaris canariensis | , annual canarygrass | LAMOURE, STUTSMAN, WILLIAMS | GFND, NDSU, USDA | Map |
| Montiaceae | Phemeranthus confertiflorus | , New Mexico fameflower | USDA | Map | |
| Montiaceae | Phemeranthus parviflorus | , sunbright | GRANT, MORTON, SIOUX, SLOPE | NDSU, USDA | Map |
| Hydrangeaceae | Philadelphus coronarius | GRAND FORKS | GFND | Map | |
| Gramineae | Phleum pratense | , timothy | BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRAND FORSK, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MERCER, MOUNTRAIL, OLIVER, RAMSEY, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Labiatae | Phlomis tuberosa | , tuberous Jerusalem sage | USDA | Map | |
| Polemoniaceae | Phlox alyssifolia | , alyssumleaf phlox | BILLINGS, WILLIAMS | GFND, NDSU, USDA | Map |
| Polemoniaceae | Phlox andicola | , prairie phlox | ADAMS, BOWMAN, DUNN, EMMONS, GRANT, MORTON, SLOPE, STARK | NDSU, USDA | Map |
| Polemoniaceae | Phlox divaricata | BENSON | GFND | Map | |
| Polemoniaceae | Phlox hoodii | , spiny phlox | BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CAVALIER, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RENVILLE, SLOPE, STARK, STUTSMAN, TOWNER, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Polemoniaceae | Phlox pilosa | , downy phlox | USDA | Map | |
| Gramineae | Phragmites australis | , common reed | BENSON, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, NELSON, RAMSEY, RANSOM, RICHLAND, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | GFND, DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Phrymaceae | Phryma leptostachya | , American lopseed | BARNES, BARNES/RANSOM, BENSON, CASS, CAVALIER, EDDY, GRAND FORKS, GRIGGS, PEMBINA, RANSOM, RICHLAND, SARGENT, STUTSMAN, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Solanaceae | Physalis heterophylla | , clammy groundcherry | BILLINGS, BURLEIGH, EMMONS, MCLEAN, MERCER, OLIVER, RANSOM, RICHLAND, STUTSMAN, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Solanaceae | Physalis hispida | BURLEIGH, DICKEY, DUNN, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SIOUX, STARK, STUTSMAN, WARD | NDSU | Map | |
| Solanaceae | Physalis lanceolata | GRAND FORKS, MORTON | GFND | Map | |
| Solanaceae | Physalis longifolia | , longleaf groundcherry | USDA | Map | |
| Solanaceae | Physalis virginiana | , Virginia groundcherry | EDDY, GRAND FORKS, NELSON, RANSOM, WALSH | DK1995, GFND, NPWRC, USDA | Map |
| Cruciferae | Physaria brassicoides | , double twinpod | BILLINGS, MCKENZIE, SLOPE | GFND, NDSU, USDA | Map |
| Cruciferae | Physaria didymocarpa | , common twinpod | USDA | Map | |
| Rosaceae | Physocarpus opulifolius | NDSU, USDA | Map | ||
| Labiatae | Physostegia ledinghamii | , Ledingham's false dragonhead | USDA | Map | |
| Labiatae | Physostegia parviflora | , western false dragonhead | BENSON, BURKE, BURLEIGH, CASS, DICKEY, EDDY, GRAND FORKS, GRIGGS, LAMOURE, MCLEAN, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Physostegia virginiana | , obedient plant | RANSOM | GFND, USDA | Map |
| Compositae | Picradeniopsis oppositifolia | , oppositeleaf bahia | BILLINGS, BOWMAN, GOLDEN VALLEY, GRANT, HETTINGER, MERCER, SLOPE | NDSU, NPWRC, USDA | Map |
| Compositae | Picris echioides | , bristly oxtongue | MCLEAN | NDSU, USDA | Map |
| Urticaceae | Pilea fontana | , lesser clearweed | KIDDER, RICHLAND, STUTSMAN | GFND, NDSU, NPWRC, USDA | Map |
| Urticaceae | Pilea pumila | , Canadian clearweed | RANSOM, WALSH | GFND, USDA | Map |
| Pinaceae | Pinus banksiana | , jack pine | USDA | Map | |
| Pinaceae | Pinus flexilis | , limber pine | BILLINGS, SLOPE | GFND, NDSU, NPWRC, USDA | Map |
| Pinaceae | Pinus mugo | CASS | NDSU | Map | |
| Pinaceae | Pinus ponderosa | , ponderosa pine | BILLINGS, BOWMAN, EDDY, GRAND FORKS, SLOPE | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Pinaceae | Pinus resinosa | GRAND FORKS | GFND | Map | |
| Pinaceae | Pinus sylvestris | CASS, GRAND FORKS | GFND, NDSU | Map | |
| Gramineae | Piptatherum exiguum | WARD | NDSU | Map | |
| Gramineae | Piptatherum micranthum | , littleseed ricegrass | BILLINGS, DUNN, EMMONS, GOLDEN VALLEY, GRANT, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SLOPE, STARK, WILLIAMS | GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Gramineae | Piptatherum pungens | , mountain ricegrass | USDA | Map | |
| Gramineae | Piptatherum racemosum | , blackseed ricegrass | GRAND FORKS, RANSOM | GFND, NPWRC, USDA | Map |
| Boraginaceae | Plagiobothrys leptocladus | , finebranched popcornflower | USDA | Map | |
| Boraginaceae | Plagiobothrys scouleri | , Scouler's popcornflower | BURLEIGH, DIVIDE, EMMONS, GRANT, HETTINGER, KIDDER, LAMOURE, MCINTOSH, MORTON, MOUNTRAIL, SHERIDAN, STARK, STUTSMAN, WARD | NDSU, MSU, NPWRC, USDA | Map |
| Plantaginaceae | Plantago aristata | , largebracted plantain | BILLINGS | NDSU, USDA | Map |
| Plantaginaceae | Plantago elongata | , prairie plantain | BARNES, BILLINGS, BOTTINEAU, CAVALIER, DIVIDE, GRIGGS, MCKENZIE, MERCER, MOUNTRAIL, PIERCE, WARD, WILLIAMS | GFND, MSU, NDSU, USDA | Map, Photo |
| Plantaginaceae | Plantago eriopoda | , redwool plantain | BARNES, BENSON, BOTTINEAU, BURKE, CASS, CAVALIER, DICKEY, DIVIDE, EDDY, GRAND FORKS, KIDDER, MCHENRY, MORTON, PIERCE, RAMSEY, RANSOM, RICHLAND, ROLETTE, STEELE, STUTSMAN, WARD | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map, Photo, Photo |
| Plantaginaceae | Plantago lanceolata | , narrowleaf plantain | CASS, STEELE | NDSU, USDA | Map |
| Plantaginaceae | Plantago major | , common plantain | BARNES, BARNES-RANSOM, BENSON, BOTTINEAU, CASS, CAVALIER, EDDY, FOSTER, GRAND FORKS, GRIGGS, MCHENRY, MCLEAN, NELSON, PEMBINA, RAMSEY, RANSOM, RENVILLE, RICHLAND, ROLETTE, SARGENT, STEELE, STUTSMAN, WALSH, WARD | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Plantago patagonica | , woolly plantain | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURLEIGH, CASS, DICKEY, EDDY, FOSTER, GRAND FORKS, GRANT, KIDDER, MCHENRY, MCKENZIE, MORTON, MOUNTRAIL, PIERCE, RAMSEY, RANSOM, SLOPE, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Plantago rugelii | , blackseed plantain | BARNES, CASS, DICKEY, EDDY, FOSTER, GRAND FORKS, LAMOURE, MCHENRY, MCLEAN, RANSOM, RICHLAND, RICHLAND-RANSOM | DK1995, GFND, NDSU, USDA | Map |
| Orchidaceae | Platanthera aquilonis | , northern green orchid | BENSON, BURKE, EDDY, GRAND FORKS, KIDDER, SARGENT, STUTSMAN, WALSH, WARD | DK1995, GFND, NPWRC, NDSU, USDA | Map |
| Orchidaceae | Platanthera clavellata | , small green wood orchid | USDA | Map | |
| Orchidaceae | Platanthera praeclara | , Great Plains white fringed orchid | USDA | Map | |
| Orchidaceae | Platanthera stricta | BURKE, KIDDER, LAMOURE, STARK, STUTSMAN | NDSU | Map | |
| Cupressaceae | Platycladus orientalis | CASS | NDSU | Map | |
| Campanulaceae | Platycodon grandiflorus | CASS, GRAND FORKS | NDSU | Map | |
| Gramineae | Poa annua | , annual bluegrass | BURLEIGH, STUTSMAN, WARD | GFND, NDSU, USDA | Map |
| Gramineae | Poa arida | , plains bluegrass | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Poa bulbosa | , bulbous bluegrass | STARK | NDSU, USDA | Map |
| Gramineae | Poa compressa | , Canada bluegrass | BARNES, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MORTON, MOUNTRAIL, OLIVER, RAMSEY, SARGENT, SHERIDAN, STARK, STUTSMAN, WARD, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Poa cusickii | , Cusick's bluegrass | BILLINGS, BURKE, DIVIDE, DUNN, MOUNTRAIL, SLOPE, WARD, WILLIAMS | GFND, NDSU, USDA | Map |
| Gramineae | Poa fendleriana | , muttongrass | USDA | Map | |
| Gramineae | Poa glauca | GRAND FORKS | GFND | Map | |
| Gramineae | Poa interior | BENSON, EDDY, GRAND FORKS, NELSON, RANSOM, STUTSMAN, WALSH | DK1995, GFND, NPWRC | Map | |
| Gramineae | Poa macrocalyx | NDSU | Map | ||
| Gramineae | Poa nematophylla | USDA | Map | ||
| Gramineae | Poa nemoralis | , wood bluegrass | BILLINGS, BURKE, DIVIDE, DUNN, EMMONS, KIDDER, MORTON, MOUNTRAIL, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | NDSU, USDA | Map |
| Gramineae | Poa palustris | , fowl bluegrass | ADAMS, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, RANSOM, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, TOWNER, WALSH, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Poa pratensis | , Kentucky bluegrass | BARNES, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMON, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Poa secunda | , Sandberg bluegrass | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MOUNTRAIL, RICHLAND, SHERIDAN, SIOUX, SLOPE, STUTSMAN, WARD, WELLS, WILLAIMS, WILLIAMS | GFND, DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Podostemaceae | Podostemum ceratophyllum | , hornleaf riverweed | USDA | Map | |
| Orchidaceae | Pogonia ophioglossoides | , snakemouth orchid | USDA | Map | |
| Cruciferae | Polanisia dodecandra | , redwhisker clammyweed | BILLINGS, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, SIOUX, SLOPE, STUTSMAN, WARD, WILLIAMS | MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Polanisia graveolens | SIOUX, SLOPE | GFND | Map | |
| Cruciferae | Polanisia trachysperma | BILLINGS, WILLIAMS | GFND, MSU | Map | |
| Polemoniaceae | Polemonium caeruleum | RICHLAND | NDSU | Map | |
| Polemoniaceae | Polemonium micranthum | , annual polemonium | USDA | Map | |
| Polygalaceae | Polygala alba | , white milkwort | BILLINGS, BOWMAN, EDDY, MCHENRY, MCKENZIE, MCLEAN, MOUNTRAIL, SARGENT, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, MSU, NPWRC, USDA | Map |
| Polygalaceae | Polygala ambigua | WARD | GFND | Map | |
| Polygalaceae | Polygala senega | , Seneca snakeroot | EDDY, GRIGGS, RANSOM, STUTSMAN, WILLIAMS | DK1995, GFND, NPWRC, USDA | Map |
| Polygalaceae | Polygala verticillata | , whorled milkwort | BENSON, EDDY, GRAND FORKS, RANSOM, STUTSMAN | DK1995, GFND, NPWRC, USDA | Map |
| Asparagaceae | Polygonatum biflorum | , smooth Solomon's seal | BILLINGS, BURKE, DUNN, EDDY, EMMONS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCLEAN, MERCER, OLIVER, SHERIDAN-WELLS, STUTSMAN, WARD, WILLIAMS | DK1995, MSU, NDSU, NPWRC, USDA | Map |
| Asparagaceae | Polygonatum commutatum | BURKE, GRAND FORKS, RANSOM, RICHLAND, WARD | GFND, MSU | Map | |
| Asparagaceae | Polygonatum giganteum | GFND | Map | ||
| Polygonaceae | Polygonum achoreum | , leathery knotweed | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, KIDDER, LAMOURE, LOGAN, MCINTOSH, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, USDA | Map |
| Polygonaceae | Polygonum amphibium | , water knotweed | BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Polygonum arenastrum | , oval-leaf knotweed | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Polygonum aviculare | , prostrate knotweed | BURKE, EMMONS, GRAND FORKS, MORTON, MOUNTRAIL, RANSOM, WARD | GFND, MSU, NDSU, USDA | Map |
| Polygonaceae | Polygonum bellardii | , narrowleaf knotweed | USDA | Map | |
| Polygonaceae | Polygonum buxiforme | , box knotweed | BARNES, BENSON, BURKE, GRAND FORKS | GFND, GFND, MSU, USDA | Map |
| Polygonaceae | Polygonum coccineum | BOTTINEAU, DICKEY, FOSTER, GRAND FORKS, LAMOURE, RICHLAND, STUTSMAN | GFND, NPWRC | Map | |
| Polygonaceae | Polygonum convolvulus | , black bindweed | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Polygonum douglasii | , Douglas' knotweed | MCKENZIE, SLOPE, STARK | NDSU, USDA | Map |
| Polygonaceae | Polygonum emersum | BENSON | GFND | Map | |
| Polygonaceae | Polygonum erectum | BENSON | GFND | Map | |
| Polygonaceae | Polygonum hartwrightii | GFND | Map | ||
| Polygonaceae | Polygonum hydropiper | , marshpepper knotweed | DICKEY, EMMONS, GRAND FORKS, HETTINGER, STUTSMAN, WALSH | GFND, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Polygonum hydropiperoides | , swamp smartweed | USDA | Map | |
| Polygonaceae | Polygonum lapathifolium | , curlytop knotweed | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RANSOM, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Polygonum leptocarpum | , narrowpoint knotweed | GRANT | NDSU, USDA | Map |
| Polygonaceae | Polygonum muhlenbergii | GRAND FORKS, RANSOM | GFND, GFND | Map | |
| Polygonaceae | Polygonum natans | GRAND FORKS, NELSON, OLIVER | GFND | Map | |
| Polygonaceae | Polygonum pensylvanicum | , Pennsylvania smartweed | BURKE, GRAND FORKS, RANSOM, WARD | GFND, GFND, MSU, NPWRC, USDA | Map |
| Polygonaceae | Polygonum persicaria | , spotted ladysthumb | DICKEY, DUNN, EMMONS, KIDDER, LAMOURE, LOGAN, MERCER, MOUNTRAIL, STUTSMAN, WELLS, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Polygonum punctatum | , dotted smartweed | EMMONS, GRAND FORKS | GFND, NDSU, USDA | Map |
| Polygonaceae | Polygonum ramosissimum | , bushy knotweed | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WELLS`, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Polygonum sagittatum | , arrowleaf tearthumb | USDA | Map | |
| Polygonaceae | Polygonum scandens | , climbing false buckwheat | EMMONS, GOLDEN VALLEY, MORTON, RANSOM | GFND, NDSU, USDA | Map |
| Polygonaceae | Polygonum tenue | GFND | Map | ||
| Gramineae | Polypogon monspeliensis | , annual rabbitsfoot grass | BURLEIGH, EMMONS, LAMOURE, MERCER, RANSOM, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Umbelliferae | Polytaenia nuttallii | , Nuttall's prairie parsley | USDA | Map | |
| Salicaceae | Populus acuminata | , lanceleaf cottonwood | BILLINGS, SLOPE | GFND, NDSU, USDA | Map |
| Salicaceae | Populus alba | , white poplar | DICKEY, GRAND FORKS, KIDDER, LOGAN | GFND, NDSU, USDA | Map |
| Salicaceae | Populus balsamifera | , balsam poplar | BENSON, BILLINGS, BURLEIGH, DIVIDE, EDDY, GRAND FORKS, OLIVER, ROLETTE, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Salicaceae | Populus canadensis | , Carolina poplar | USDA | Map | |
| Salicaceae | Populus deltoides | , eastern cottonwood | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDDER, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, OLIVER, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS, WILLISTON | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Salicaceae | Populus grandidentata | , bigtooth aspen | USDA | Map | |
| Salicaceae | Populus jackii | , balm-of-Gilead | BILLINGS, BURKE, GRANT, WARD | NDSU, USDA | Map |
| Salicaceae | Populus nigra | , Lombardy poplar | GRAND FORKS, RANSOM | GFND, USDA | Map |
| Salicaceae | Populus populus | GRANT, START | NDSU | Map | |
| Salicaceae | Populus tremuloides | , quaking aspen | BILLINGS, BURKE, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, MCHENRY, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, RICHLAND, ROLETTE, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cactaceae | Portulaca oleracea | , little hogweed | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, GRANT, LAMOURE, MCHENRY, MCINTOSH, SLOPE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Potamogetonaceae | Potamogeton amplifolius | , largeleaf pondweed | GRAND FORKS, MCLEAN, OLIVER | GFND, NDSU, USDA | Map |
| Potamogetonaceae | Potamogeton crispus | , curly pondweed | BARNES | NPWRC, USDA | Map |
| Potamogetonaceae | Potamogeton diversifolius | , waterthread pondweed | EMMONS, SLOPE, STUTSMAN, WARD | NDSU, USDA | Map |
| Potamogetonaceae | Potamogeton foliosus | , leafy pondweed | DICKEY, EMMONS, GOLDEN VALLEY, GRAND FORKS, HETTINGER, LAMOURE, MCINTOSH, MERCER, OLIVER, SLOPE, STUTSMAN, WALSH, WARD | GFND, NDSU, USDA | Map |
| Potamogetonaceae | Potamogeton friesii | , Fries' pondweed | USDA | Map | |
| Potamogetonaceae | Potamogeton gramineus | BURKE, DICKEY, DIVIDE, KIDDER, LAMOURE, LOGAN, STUTSMAN, TOWNER, WILLIAMS | GFND, NDSU, NPWRC | Map | |
| Potamogetonaceae | Potamogeton illinoensis | , Illinois pondweed | RICHLAND | GFND, USDA | Map |
| Potamogetonaceae | Potamogeton natans | , floating pondweed | BOTTINEAU, BURKE, STUTSMAN, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Potamogetonaceae | Potamogeton nodosus | , longleaf pondweed | MORTON, RANSOM, SLOPE | NDSU, NPWRC, USDA | Map |
| Potamogetonaceae | Potamogeton praelongus | , whitestem pondweed | STUTSMAN | NPWRC, USDA | Map |
| Potamogetonaceae | Potamogeton pusillus | , small pondweed | BILLINGS, BOWMAN, BURKE, CAVALIER, DUNN, EDDY, EMMONS, GOLDEN VALLEY, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SLOPE, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Potamogetonaceae | Potamogeton richardsonii | , Richardson's pondweed | BARNES, BENSON, BILLINGS, BURKE, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, KIDDER, LOGAN, MCHENRY, MCINTOSH, MERCER, MORTON, MOUNTRAIL, SLOPE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Potamogetonaceae | Potamogeton spirillus | , spiral pondweed | STUTSMAN | NPWRC, USDA | Map |
| Potamogetonaceae | Potamogeton strictifolius | , narrowleaf pondweed | USDA | Map | |
| Potamogetonaceae | Potamogeton zosteriformis | , flatstem pondweed | GOLDEN VALLEY, MERCER, NELSON, OLIVER, RAMSEY, SLOPE | GFND, NDSU, NPWRC, USDA | Map |
| Rosaceae | Potentilla argentea | , silver cinquefoil | GRAND FORKS, MCHENRY | GFND, NPWRC, USDA | Map |
| Rosaceae | Potentilla arguta | , tall cinquefoil | BENSON, BILLINGS, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCINTSOH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RANSOM, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Potentilla argyrea | GRAND FORKS | GFND | Map | |
| Rosaceae | Potentilla bipinnatifida | , tansy cinquefoil | BENSON, BILLINGS, DUNN, GRAND FORKS, MCHENRY, STUTSMAN, WARD | GFND, MSU, NDSU, USDA | Map |
| Rosaceae | Potentilla concinna | , elegant cinquefoil | BOWMAN, BURKE, DICKEY, DIVIDE, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, MCHENRY, MERCER, MOUNTRAIL, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NDSU, MSU, NPWRC, USDA | Map |
| Rosaceae | Potentilla diversifolia | BILLINGS, STARK | NDSU | Map | |
| Rosaceae | Potentilla effusa | BURKE, MOUNTRAIL | NDSU | Map | |
| Rosaceae | Potentilla flabelliformis | BURKE, DIVIDE, MOUNTRAIL | NDSU | Map | |
| Rosaceae | Potentilla fruticosa | BILLINGS, DUNN, GOLDEN VALLEY, GRANT, SLOPE | GFND, NDSU, NPWRC, USDA | Map | |
| Rosaceae | Potentilla gracilis | , slender cinquefoil | BILLINGS, BURKE, BURLEIGH, DUNN, GOLDEN VALLEY, GRANT, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MOUNTRAIL, NELSON, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Potentilla hippiana | , woolly cinquefoil | BILLINGS, BOWMAN, BURKE, DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LOGAN, MCKENZIE, MERCER, MOUNTRAIL, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Potentilla monspeliensis | BENSON, BOTTINEAU, GRAND FORKS | GFND | Map | |
| Rosaceae | Potentilla norvegica | , Norwegian cinquefoil | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, RENVILLE, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Potentilla nuttallii | SIOUX | GFND | Map | |
| Rosaceae | Potentilla paradoxa | , Paradox cinquefoil | BILLINGS, BURKE, BURLEIGH, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, MCHENRY, MCINTOSH, MCKENZIE, MOUNTRAIL, RICHLAND, SHERIDAN, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Potentilla pensylvanica | , Pennsylvania cinquefoil | BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, RAMSEY, RANSOM, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Potentilla plattensis | , Platte River cinquefoil | BILLINGS, BURKE, DIVIDE, MOUNTRAIL, WILLIAMS | MSU, NDSU, USDA | Map |
| Rosaceae | Potentilla pulcherrima | BENSON | GFND | Map | |
| Rosaceae | Potentilla recta | , sulphur cinquefoil | WARD | MSU, USDA | Map |
| Rosaceae | Potentilla rivalis | , brook cinquefoil | BENSON, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, LAMOURE, LOGAN, MCHENRY, RICHLAND, ROLETTE, SHERIDAN, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Potentilla supina | BENSON | GFND | Map | |
| Compositae | Prenanthes alba | , white rattlesnakeroot | BOTTINEAU, RANSOM, RICHLAND, ROLETTE, WALSH | GFND, NDSU, NPWRC, USDA | Map |
| Compositae | Prenanthes racemosa | , purple rattlesnakeroot | BENSON, BURKE, CAVALIER, DICKEY, EDDY, LAMOURE, MCHENRY, MCLEAN, RAMSEY, RANSOM, STUTSMAN, WARD | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Primulaceae | Primula incana | , silvery primrose | BURKE | MSU, NDSU, USDA | Map |
| Pedaliaceae | Proboscidea louisiana | BARNES | NDSU | Map | |
| Liliaceae | Prosartes trachycarpa | , roughfruit fairybells | BILLINGS, BOT, BOTTINEAU, BURKE, DUNN, EDDY, GOLDEN VALLEY, MCLEAN, MORTON, MOUNTRAIL, OLIVER, ROLETTE, SHERIDAN/WELLS, SLOPE, STARK, WARD, WILLIAMS | DK1995, GFND, MSU, NPWRC, MSU, NDSU, USDA | Map |
| Labiatae | Prunella vulgaris | , common selfheal | BENSON, EDDY, MCHENRY, STUTSMAN | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Rosaceae | Prunus americana | , American plum | BILLINGS, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RICHLAND, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Prunus besseyi | BILLINGS, RANSOM, RICHLAND | GFND, NPWRC | Map | |
| Rosaceae | Prunus demissa | BENSON | GFND | Map | |
| Rosaceae | Prunus nigra | GRAND FORKS, MCHENRY | GFND, NPWRC | Map | |
| Rosaceae | Prunus pensylvanica | , pin cherry | BURKE, DUNN, GRAND FORKS, LAMOURE, MCKENZIE, MCLEAN, MOUNTRAIL, OLIVER, ROLETTE, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Rosaceae | Prunus pumila | , sandcherry | ADAMS, BILLINGS, BOWMAN, BURKE, CAVALIER, DUNN, EMMONS, GOLDEN VALLLEY, GRAND FORKS, HETTINGER, KIDDER, LOGAN, MCINTSOH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RANSOM, SLOPE, STARK, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Rosaceae | Prunus serotina | , black cherry | USDA | Map | |
| Rosaceae | Prunus tomentosa | GRAND FORKS | GFND | Map | |
| Rosaceae | Prunus triloba | GRAND FORKS | GFND | Map | |
| Rosaceae | Prunus virginiana | , chokecherry | BARNES, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTSOH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RICHLAND, ROLETTE, ROLLETTE, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAM, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Psathyrostachys juncea | , Russian wildrye | DIVIDE, GRAND FORKS, MERCER, RENVILLE, WILLIAMS | GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Plantaginaceae | Pseudolysimachion longifolium | , longleaf speedwell | USDA | Map | |
| Gramineae | Pseudoroegneria spicata | , bluebunch wheatgrass | BILLINGS, GOLDEN VALLEY, MOUNTRAIL, SLOPE, WILLIAMS | MSU, NDSU, USDA | Map |
| Leguminosae | Psoralea agrophylla | BILLINGS, MERCER, RANSOM | GFND | Map | |
| Leguminosae | Psoralidium lanceolatum | , lemon scurfpea | BILLINGS, BOWMAN, BURLEIGH, EMMONS, GOLDEN VALLEY, KIDDER, KIDDERQ, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, SIOUX, SLOPE, WILLIAMS | GFND, MSU, NPWRC, NDSU, USDA | Map |
| Leguminosae | Psoralidium tenuiflorum | , slimflower scurfpea | MSU, USDA | Map | |
| Polypodiaceae | Pteridium aquilinum | , western brackenfern | PEMBINA | GFND, NPWRC, USDA | Map |
| Gramineae | Puccinellia distans | , weeping alkaligrass | GOLDEN VALLEY, GRAND FORKS, RAMSEY, SHERIDAN, WILLIAMS | GFND, NDSU, USDA | Map |
| Gramineae | Puccinellia nuttalliana | , Nuttall's alkaligrass | BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, ROLETTE, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Pycnanthemum pilosum | GRAND FORKS | GFND | Map | |
| Labiatae | Pycnanthemum virginianum | , Virginia mountainmint | RANSOM, RICHLAND | GFND, NPWRC, USDA | Map |
| Ericaceae | Pyrola americana | GFND | Map | ||
| Ericaceae | Pyrola asarifolia | , liverleaf wintergreen | DUNN, MCHENRY, ROLETTE | GFND, NDSU, NPWRC, USDA | Map |
| Ericaceae | Pyrola elliptica | , waxflower shinleaf | BILLINGS, DUNN, EDDY, ROLETTE | GFND, NDSU, NDSU, NPWRC, USDA | Map |
| Compositae | Pyrrocoma lanceolata | , lanceleaf goldenweed | BURKE, DIVIDE, MOUNTRAIL, WARD, WILLIAMS | NPWRC, MSU, NDSU, USDA | Map |
| Rosaceae | Pyrus americana | GRAND FORKS | GFND | Map | |
| Rosaceae | Pyrus malus | GRAND FORKS | GFND, GFND | Map | |
| Fagaceae | Quercus alba | GRAND FORKS | GFND | Map | |
| Fagaceae | Quercus ellipsoidalis | , northern pin oak | USDA | Map | |
| Fagaceae | Quercus heterophylla | USDA | Map | ||
| Fagaceae | Quercus lyrata | GFND | Map | ||
| Fagaceae | Quercus macrocarpa | , bur oak | BILLINGS, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, GRIGGS, KIDDER, LOGAN, MCHENRY, MCLEAN, MORTON, MOUNTRAIL, OLIVER, RICHLAND, ROLETTE, SIOUX, STARK, STUTSMAN, WALSH, WARD, WELLS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Ranunculus abortivus | , littleleaf buttercup | BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, LAMOURE, MCLEAN, MERCER, OLIVER, RAMSEY, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Ranunculaceae | Ranunculus acris | , tall buttercup | USDA | Map | |
| Ranunculaceae | Ranunculus aquatilis | BENSON, DUNN, GRAND FORKS, LAMOURE, MCINTOSH, RANSOM, RICHLAND, WARD, WILLIAMS | GFND, MSU, NDSU | Map | |
| Ranunculaceae | Ranunculus cardiophyllus | , heartleaf buttercup | MCKENZIE | NDSU, USDA | Map |
| Ranunculaceae | Ranunculus cymbalaria | , alkali buttercup | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Ranunculus eremogenes | BENSON | GFND | Map | |
| Ranunculaceae | Ranunculus flabellaris | , yellow water buttercup | BURKE, DICKEY, EMMONS, GRAND FORKS, LAMOURE, OLIVER, RANSOM, RICHLAND, STUTSMAN, WALSH, WELLS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Ranunculus flammula | , greater creeping spearwort | BURKE | NDSU, USDA | Map |
| Ranunculaceae | Ranunculus glaberrimus | , sagebrush buttercup | BILLINGS, BOWMAN, KIDDER, LOGAN, MCHENRY, MCINTOSH, STUTSMAN, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Ranunculus gmelinii | , Gmelin's buttercup | BENSON, BURKE, DIVIDE, EDDY, GRAND FORKS, KIDDER, MCHENRY, MOUNTRAIL, NELSON, STUTSMAN, TOWNER, WELLS | DK1995, GFND, NPWRC, NDSU, USDA | Map |
| Ranunculaceae | Ranunculus hispidus | , bristly buttercup | BURKE, DUNN, EDDY, EMMONS, LAMOURE, LOGAN, MOUNTRAIL, STUTSMAN | DK1995, MSU, NDSU, USDA | Map |
| Ranunculaceae | Ranunculus longirostris | , longbeak buttercup | BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, DK1995, NPWRC, NDSU, USDA | Map |
| Ranunculaceae | Ranunculus macounii | , Macoun's buttercup | BARNES, BENSON, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, SLOPE, STARK, STUTSMAN, TRAILL, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Ranunculus pedatifidus | , surefoot buttercup | USDA | Map | |
| Ranunculaceae | Ranunculus pensylvanicus | , Pennsylvania buttercup | BARNES, BENSON, BURLEIGH, DICKEY, DUNN, EDDY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCLEAN, STUTSMAN, WALSH, WARD, WELLS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Ranunculus recurvatus | , blisterwort | GRAND FORKS | GFND, USDA | Map |
| Ranunculaceae | Ranunculus rhomboideus | , Labrador buttercup | BARNES, BENSON, BURKE, CAVALIER, DIVIDE, EDDY, EMMONS, GRAND FORKS, KIDDER, MCINTOSH, MERCER, MOUNTRAIL, SLOPE, STUTSMAN, WARD | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Ranunculus sceleratus | , cursed buttercup | BARNES, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MOUNTRAIL, OLIVER, RANSOM, ROLETTE, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Ranunculus septentrionalis | LAMOURE, NELSON, RANSOM, RICHLAND, STUTSMAN | GFND, NPWRC | Map | |
| Ranunculaceae | Ranunculus trichophyllus | , threadleaf crowfoot | USDA | Map | |
| Cruciferae | Raphanus raphanistrum | , wild radish | GRAND FORKS | GFND, USDA | Map |
| Cruciferae | Raphanus sativus | , cultivated radish | BENSON, GRAND FORKS | GFND, USDA | Map |
| Compositae | Ratibida columnifera | , upright prairie coneflower | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, TRAIL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Ratibida pinnata | BENSON | GFND | Map | |
| Gramineae | Redfieldia flexuosa | , blowout grass | KIDDER, MCHENRY, SIOUX | GFND, NDSU, NPWRC, USDA | Map |
| Resedaceae | Reseda odorata | BURLEIGH | NDSU | Map | |
| Rhamnaceae | Rhamnus alnifolia | , alderleaf buckthorn | GRAND FORKS | GFND, USDA | Map |
| Rhamnaceae | Rhamnus cathartica | , common buckthorn | BARNES, BURKE, BURLEIGH, DIVIDE, EDDY, GRAND FORKS, HETTINGER, MCLEAN, MOUNTRAIL, STUTSMAN | DK1995, GFND, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Rhamnaceae | Rhamnus davurica | , Dahurian buckthorn | USDA | Map | |
| Rhamnaceae | Rhamnus frangula | GRAND FORKS | GFND | Map | |
| Orobanchaceae | Rhinanthus minor | , little yellow rattle | USDA | Map | |
| Anacardiaceae | Rhus aromatica | BILLINGS, SIOUX | GFND, NPWRC | Map | |
| Anacardiaceae | Rhus canadensis | BILLINGS | GFND | Map | |
| Anacardiaceae | Rhus glabra | , smooth sumac | BARNES, BENSON, GRAND FORKS, RICHLAND, WALSH | GFND, NPWRC, USDA | Map |
| Anacardiaceae | Rhus microcarpa | BARNES | NPWRC | Map | |
| Anacardiaceae | Rhus radicans | GRAND FORKS, RICHLAND, STUTSMAN | GFND, NPWRC | Map | |
| Cyperaceae | Rhynchospora capillacea | , needle beaksedge | BOTTINEAU, MCHENRY | GFND, USDA | Map |
| Saxifragaceae | Ribes americanum | , American black currant | BILLINGS, BURKE, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, TRAILL, WALSH, WILLIAMS | DK1995, GFND, GFND, NDSU, NPWRC, USDA | Map |
| Saxifragaceae | Ribes aureum | , golden currant | BILINGS, BILLINGS, BOWMAN, BURLEIGH, DIVIDE, DUNN, GOLDEN VALLEY, GRAND FORKS, KIDDER, MCKENZIE, MORTON, SLOPE, STARK, WILLIAMS | GFND, NDSU, USDA | Map |
| Saxifragaceae | Ribes cereum | , wax currant | BILLINGS, BOWMAN, SLOPE | NDSU, USDA | Map |
| Saxifragaceae | Ribes cynosbati | , eastern prickly gooseberry | GRAND FORKS | GFND, USDA | Map |
| Saxifragaceae | Ribes floridum | BENSON, GRAND FORKS, RICHLAND | GFND | Map | |
| Saxifragaceae | Ribes gracile | GRAND FORKS | GFND | Map | |
| Saxifragaceae | Ribes hirtellum | , hairystem gooseberry | GRAND FORKS, MOUNTRAIL, WALSH | GFND, NDSU, USDA | Map |
| Saxifragaceae | Ribes missouriense | , Missouri gooseberry | BURLEIGH, DICKEY, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, MCLEAN, RICHLAND, STUTSMAN | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Saxifragaceae | Ribes odoratum | BILLINGS, DICKEY, GRAND FORKS, MCKENZIE, SLOPE | GFND, MSU, NPWRC | Map | |
| Saxifragaceae | Ribes oxyacanthoides | , Canadian gooseberry | BILLINGS, BOWMAN, BURKE, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, MCHENRY, MCLEAN, MORTON, MOUNTRAIL, OLIVER, RICHLAND, SLOPE, STARK, WILLIAMS | DK1995, GFND, NDSU, USDA | Map |
| Saxifragaceae | Ribes rotundifolium | RANSOM | GFND | Map | |
| Saxifragaceae | Ribes setosum | BILLINGS, SLOPE | GFND | Map | |
| Saxifragaceae | Ribes triste | , red currant | ROLETTE | NPWRC, USDA | Map |
| Saxifragaceae | Ribes uva-crispa | , European gooseberry | USDA | Map | |
| Leguminosae | Robinia pseudoacacia | , black locust | USDA | Map | |
| Cruciferae | Rorippa alpina | BILLINGS, DUNN, KIDDER, LAMOURE, MOUNTRAIL, WARD | NDSU | Map | |
| Cruciferae | Rorippa austriaca | , Austrian yellowcress | STUTSMAN, WALSH | NDSU, NPWRC, USDA | Map |
| Cruciferae | Rorippa barbareifolia | BILLINGS, LOGAN, MCLEAN, MERCER, STUTSMAN, WARD | NDSU | Map | |
| Cruciferae | Rorippa calycina | , persistent sepal yellowcress | USDA | Map | |
| Cruciferae | Rorippa curvipes | , bluntleaf yellowcress | DIVIDE, STUTSMAN, WILLIAMS | MSU, NDSU, USDA | Map |
| Cruciferae | Rorippa hispida | GFND | Map | ||
| Cruciferae | Rorippa islandica | BARNES, CASS, GRAND FORKS, NELSON, WALSH | GFND | Map | |
| Cruciferae | Rorippa palustris | , bog yellowcress | BILLINGS, BOTTINEAU, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCLEAN, MORTON, MOUNTRAIL, RANSOM, STARK, STUSTMAN, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Rorippa sinuata | , spreading yellowcress | ADAMS, BILLINGS, BOWMAN, BURLEIGH, DICKEY, GRANT, HETTINGER, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, SLOPE, STARK, WILLIAMS | MSU, NDSU, USDA | Map |
| Cruciferae | Rorippa sylvestris | , creeping yellowcress | WARD | MSU, USDA | Map |
| Cruciferae | Rorippa tenerrima | , Modoc yellowcress | USDA | Map | |
| Rosaceae | Rosa acicularis | , prickly rose | EDDY, GRAND FORKS, ROLETTE | DK1995, GFND, USDA | Map |
| Rosaceae | Rosa arkansana | , prairie rose | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Rosa blanda | , smooth rose | BILLINGS, BOWMAN, BURKE, CAVALIER, DIVIDE, DUNN, EDDY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MOUNTRAIL, OLIVER, PIERCE, SLOPE, STARK, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, USDA | Map |
| Rosaceae | Rosa centifolia | GRAND FORKS | GFND | Map | |
| Rosaceae | Rosa dulcissima | USDA | Map | ||
| Rosaceae | Rosa humilis | GFND | Map | ||
| Rosaceae | Rosa suffulta | BENSON | GFND | Map | |
| Rosaceae | Rosa woodsii | , Woods' rose | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Rubus idaeus | , American red raspberry | BARNES, BILLINGS, BOTTINEAU, BURKE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, RICHLAND, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Rubus occidentalis | , black raspberry | BURKE, EMMONS, MORTON, MOUNTRAIL, WARD | GFND, MSU, NDSU, USDA | Map |
| Rosaceae | Rubus pubescens | , dwarf red blackberry | BOTTINEAU, MCHENRY, ROLETTE, STUTSMAN | GFND, NDSU, NPWRC, USDA | Map |
| Rosaceae | Rubus triflorus | RANSOM, ROLETTE | GFND | Map | |
| Compositae | Rudbeckia hirta | , blackeyed Susan | BENSON, BOTTINEAU, BURLEIGH, BURLIEGH, CASS, CAVALIER, DICKEY, DIVIDE, EDDY, EMMONS, FOSTER, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MORTON, PIERCE, RAMSEY, RANSOM, SARGENT, SHERIDAN, STUTSMAN, WALSH, WARD | DK1995, GFND, GFND, MSU, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Rudbeckia laciniata | , cutleaf coneflower | BILLINGS, CASS, EDDY, GRAND FORKS, LAMOURE, RANSOM, ROLETTE, STUTSMAN, TRAILL, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Compositae | Rudbeckia serotina | BILLINGS, CAVALIER, GRAND FORKS, MCKENZIE, RICHLAND | GFND, GFND, MSU | Map | |
| Polygonaceae | Rumex acetosella | , common sheep sorrel | BILLINGS, RICHLAND, STARK, STUTSMAN | NDSU, NPWRC, USDA | Map |
| Polygonaceae | Rumex altissimus | KIDDER, STUTSMAN | NDSU, NPWRC | Map | |
| Polygonaceae | Rumex aquaticus | , western dock | BILLINGS, BURKE, DICKEY, LAMOURE, LOGAN, MORTON, MOUNTRAIL, STUTSMAN, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Polygonaceae | Rumex britannica | NELSON, RANSOM | GFND, GFND | Map | |
| Polygonaceae | Rumex confertus | BILLINGS | NDSU | Map | |
| Polygonaceae | Rumex crispus | , curly dock | BILLINGS, BOWMAN, CASS, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SIOUX, SLOPE, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Rumex longifolius | , dooryard dock | DICKEY, DIVIDE, KIDDER, LAMOURE, MCINTOSH, MOUNTRAIL, STUTSMAN, WELLS | NPWRC, NDSU, USDA | Map |
| Polygonaceae | Rumex maritimus | , golden dock | BARNES, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SLOPE, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Rumex mexicanus | EDDY, MERCER, STUTSMAN, WELLS | DK1995, GFND, NDSU, NPWRC | Map | |
| Polygonaceae | Rumex obtusifolius | DIVIDE | GFND, NPWRC | Map | |
| Polygonaceae | Rumex occidentalis | EDDY, GRAND FORKS, KIDDER, STUTSMAN | DK1995, GFND, NPWRC | Map | |
| Polygonaceae | Rumex orbiculatus | , greater water dock | KIDDER, OLIVER, STUTSMAN | GFND, NPWRC, USDA | Map |
| Polygonaceae | Rumex patientia | , patience dock | BURLEIGH, GOLDEN VALLEY, STARK | NDSU, USDA | Map |
| Polygonaceae | Rumex persicariodes | GRAND FORKS | GFND | Map | |
| Polygonaceae | Rumex pseudonatronatus | , field dock | BURKE, BURLEIGH, DICKEY, DIVIDE, EMMONS, GRANT, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MORTON, SHERIDAN, STUTSMAN, WARD, WILLIAMS | NDSU, USDA | Map |
| Polygonaceae | Rumex salicifolius | , willow dock | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Polygonaceae | Rumex stenophyllus | , narrowleaf dock | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, EDDY, EMMONS, GRANT, LAMOURE, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SLOPE, STARK, WARD, WELLS, WILLIAMS | DK1995, NDSU, USDA | Map |
| Polygonaceae | Rumex venosus | , veiny dock | BILLINGS, BOWMAN, BURLEIGH, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, MCKENZIE, MCLEAN, MERCER, SIOUX, SLOPE, STARK, STUTSMAN, WILLIAMS | GFND, NDSU, NPWRC, USDA | Map |
| Polygonaceae | Rumex verticillatus | GRAND FORKS | GFND | Map | |
| Potamogetonaceae | Ruppia cirrhosa | , spiral ditchgrass | BURKE, KIDDER, LOGAN, MCINTOSH, STUTSMAN, WILLIAMS | NDSU, USDA | Map |
| Potamogetonaceae | Ruppia maritima | EDDY, KIDDER, LOGAN, MCINTOSH, MCLEAN, RAMSEY, STUTSMAN | DK1995, GFND, NDSU, NPWRC | Map | |
| Alismataceae | Sagittaria brevirostra | , shortbeak arrowhead | USDA | Map | |
| Alismataceae | Sagittaria cuneata | , arumleaf arrowhead | ADAMS, BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, BURLERIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RENVILLE, RICHLAND, ROLETTE, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STEELE, STUTSMAN, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Alismataceae | Sagittaria latifolia | , broadleaf arrowhead | CASS, CAVALIER, DICKEY, EDDY, GRAND FORKS, LAMOURE, PEMBINA, RANSOM, RICHLAND, STUTSMAN | DK1995, NDSU, NPWRC, USDA | Map |
| Amaranthaceae | Salicornia europaea | GRAND FORKS, RANSOM | GFND | Map | |
| Amaranthaceae | Salicornia rubra | , red swampfire | DIVIDE, GRAND FORKS, LOGAN, MCINTOSH, MOUNTRAIL, RAMSEY, STUTSMAN, WILLIAMS | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Salicaceae | Salix alba | , white willow | EDDY, GRAND FORKS, MCINTOSH, MOUNTRAIL, START, STUTSMAN, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Salicaceae | Salix amygdaloides | , peachleaf willow | BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Salicaceae | Salix bebbiana | , Bebb willow | BENSON, BILLINGS, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, MCHENRY, MERCER, MOUNTRAIL, OLIVER, ROLETTE, SHERIDAN, SLOPE, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Salicaceae | Salix candida | , sageleaf willow | BENSON, BURKE, EDDY, KIDDER, STUTSMAN | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Salicaceae | Salix discolor | , pussy willow | BURKE, DIVIDE, EDDY, GRAND FORKS, KIDDER, MCHENRY, MOUNTRAIL, OLIVER, ROLETTE, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Salicaceae | Salix eriocephala | , Missouri River willow | BURLEIGH, DICKEY, EDDY, EMMONS, GRAND FORKS, KIDDER, LOGAN, MERCER, MORTON, PEMBINA, SARGENT, STUTSMAN, WILLIAMS | DK1995, GFND, NPWRC, NDSU, USDA | Map |
| Salicaceae | Salix exigua | BURLEIGH, DICKEY, EDDY, GRAND FORKS, STUTSMAN, WALSH | DK1995, GFND, NDSU, NPWRC | Map | |
| Salicaceae | Salix fragilis | , crack willow | STUTSMAN, WARD | MSU, NPWRC, USDA | Map |
| Salicaceae | Salix humilis | , prairie willow | MCHENRY | NPWRC, USDA | Map |
| Salicaceae | Salix interior | , sandbar willow | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINSTOSH, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTAIL, MOUNTRAIL, OLIVER, RICHLAND, SHERIDAN, SIOUX, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, GFND, MSU, NDSU, USDA | Map |
| Salicaceae | Salix lucida | , shining willow | GRAND FORKS, MCHENRY | GFND, NPWRC, USDA | Map |
| Salicaceae | Salix lutea | , yellow willow | BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SIOUX, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NDSU, USDA | Map |
| Salicaceae | Salix maccalliana | , McCalla's willow | USDA | Map | |
| Salicaceae | Salix pedicellaris | , bog willow | BOTTINEAU, MCHENRY, RANSOM | GFND, NPWRC, USDA | Map |
| Salicaceae | Salix pentandra | , laurel willow | EDDY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MERCER, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Salicaceae | Salix petiolaris | , meadow willow | BURKE, DICKEY, DIVIDE, EDDY, GRAND FORKS, KIDDER, MCHENRY, MOUNTRAIL, SLOPE, STUTSMAN, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Salicaceae | Salix serissima | , autumn willow | KIDDER, STUTSMAN | NPWRC, USDA | Map |
| Amaranthaceae | Salsola collina | , slender Russian thistle | EMMONS, KIDDER, MCHENRY, STARK | NDSU, USDA | Map |
| Amaranthaceae | Salsola kali | BILLINGS, BURKE, DIVIDE, GOLDEN VALLEY, GRANT, MOUNTRAIL, SLOPE, STUTSMAN, WARD | MSU, NDSU | Map | |
| Amaranthaceae | Salsola tragus | , prickly Russian thistle | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MERCER, MORTON, PIERCE, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WELLS, WILLIAMS | DK1995, GFND, NPWRC, NDSU, USDA | Map |
| Labiatae | Salvia reflexa | , lanceleaf sage | BILLINGS, DUNN, EDDY, GOLDEN VALLEY, LAMOURE, MCKENZIE, MCLEAN, STARK, STUTSMAN | DK1995, NDSU, USDA | Map |
| Labiatae | Salvia sylvestris | , woodland sage | GRAND FORKS, LOGAN, SLOPE | GFND, NDSU, USDA | Map |
| Caprifoliaceae | Sambucus canadensis | CASS, EDDY, EMMONS, GRAND FORKS, MCINTOSH, RICHLAND, STUTSMAN, WALSH | DK1995, GFND, NDSU | Map | |
| Caprifoliaceae | Sambucus nigra | , black elderberry | USDA | Map | |
| Caprifoliaceae | Sambucus racemosa | , red elderberry | CASS, RICHLAND, WALSH | NDSU, NDSU, USDA | Map |
| Papaveraceae | Sanguinaria canadensis | , bloodroot | CASS, GRAND FORKS, RICHLAND | GFND, GFND, NPWRC, USDA | Map |
| Umbelliferae | Sanicula marilandica | , Maryland sanicle | BILLINGS, BURKE, BURLEIGH, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, HETTINGER, KIDDER, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RANSOM, ROLETTE, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Umbelliferae | Sanicula odorata | , clustered blacksnakeroot | USDA | Map | |
| Caryophyllaceae | Saponaria officinalis | , bouncingbet | BENSON, BURKE, BURLEIGH, DICKEY, DIVIDE, GRANT, KIDDER, MCINTOSH, MORTON, MOUNTRAIL, STUTSMAN, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Phytolaccaceae | Sarcobatus vermiculatus | , greasewood | BILLINGS, DIVIDE, GOLDEN VALLEY, GRANT, MCKENZIE, SLOPE, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Schedonnardus paniculatus | , tumblegrass | BILLINGS, BILLLNGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GRANT, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Schedonorus pratensis | , meadow fescue | EDDY, WILLIAMS | DK1995, NDSU, MSU, USDA | Map |
| Juncaginaceae | Scheuchzeria palustris | , rannoch-rush | BOTTINEAU | GFND, USDA | Map |
| Gramineae | Schizachne purpurascens | , false melic | BOTTINEAU, DUNN, GRAND FORKS, MCHENRY, MOUNTRAIL, RAMSEY, WALSH, WARD | GFND, NDSU, USDA | Map |
| Gramineae | Schizachyrium scoparium | , little bluestem | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, BURLEIIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RENVILLE, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | MSU, NDSU, USDA | Map |
| Cyperaceae | Schoenoplectus acutus | , hardstem bulrush | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RAMSEY, SHERIDAN, SLOPE, STARK, STUTSMAN, TRAILL, WARD, WELLS, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Cyperaceae | Schoenoplectus americanus | BENSON, BURKE, DICKEY, GRAND FORKS, LOGAN, MCHENRY, RAMSEY, RANSOM, RICHLAND, STEELE, STUTSMAN, WALSH, WARD, WILLIAMS | GFND, NPWRC, MSU, NDSU | Map | |
| Cyperaceae | Schoenoplectus fluviatilis | , river bulrush | BURKE, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, GRIGGE, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, NELSON, OLIVER, PIERCE, RAMSEY, RENVILLE, SLOPE, STEELE, STUTSMAN, TOWNER, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Cyperaceae | Schoenoplectus heterochaetus | , slender bulrush | BOWMAN, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MERCER, STUTSMAN, WARD, WELLS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Cyperaceae | Schoenoplectus maritimus | , cosmopolitan bulrush | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, RICHLAND, SHERIDAN, SLOPE, STUTSMAN, TOWNER, TRAILL, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Cyperaceae | Schoenoplectus oblongus | USDA | Map | ||
| Cyperaceae | Schoenoplectus pungens | , common threesquare | ADAMS, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, NDSU, USDA | Map |
| Cyperaceae | Schoenoplectus tabernaemontani | , softstem bulrush | ADAMS, BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, RAMSEY, RANSOM, RICHLAND, SLOPE, STARK, STUTSMAN, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Cyperaceae | Scirpus atrovirens | , green bulrush | BENSON, BURKE, DICKEY, EDDY, GRAND FORKS, KIDDER, LOGAN, MCINTOSH, MOUNTRAIL, OLIVER, RANSOM, RICHLAND, ROLETTE, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Scirpus microcarpus | , panicled bulrush | BARNES, BILLINGS, BOTTINEAU, DUNN, EDDY, GRAND FORKS, GRANT, HETTINGER, MCINTOSH, MERCER, MORTON, NELSON, OLIVER, ROLETTE, STUTSMAN, WALSH | DK1995, GFND, GFND, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Scirpus nevadensis | , Nevada bulrush | BURKE, KIDDER, MCHENRY, MOUNTRAIL, PIERCE, WARD, WILLIAMS | MSU, NDSU, NPWRC, USDA | Map |
| Cyperaceae | Scirpus pallidus | , cloaked bulrush | BILLINGS, BURKE, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, MERCER, MORTON, MOUNTRAIL, OLIVER, SIOUX, STARK, STUTSMAN, WARD | DK1995, GFND, NDSU, USDA | Map |
| Gramineae | Scolochloa festucacea | , common rivergrass | BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, OLIVER, RAMSEY, STEELE, STUTSMAN, TRAILL, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NDSU, NDSU, NPWRC, USDA | Map |
| Scrophulariaceae | Scrophularia lanceolata | , lanceleaf figwort | BARNES, BENSON, CASS, GRAND FORKS, GRIGGS, PIERCE, RANSOM, RICHLAND, SARGENT, TRAILL, WALSH, WARD | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Scutellaria galericulata | , marsh skullcap | BENSON, BOTTINEAU, BURKE, BURLEIGH, CASS, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, NELSON, OLIVER, RAMSEY, RICHLAND, ROLETTE, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Scutellaria lateriflora | , blue skullcap | EDDY, GRAND FORKS, MORTON, OLIVER, RANSOM, RICHLAND, STUTSMAN, TRAILL, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Scutellaria leonardii | GRAND FORKS | GFND | Map | |
| Labiatae | Scutellaria parvula | , small skullcap | RANSOM | GFND, USDA | Map |
| Gramineae | Secale cereale | , cereal rye | GRAND FORKS, LOGAN, MCINTOSH, PEMBINA, STUTSMAN | GFND, NDSU, USDA | Map |
| Selaginellaceae | Selaginella densa | , lesser spikemoss | MCHENRY, MOUNTRAIL, SLOPE, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Selaginellaceae | Selaginella engelmannii | PEMBINA | NDSU | Map | |
| Selaginellaceae | Selaginella rupestris | , northern selaginella | USDA | Map | |
| Compositae | Senecio congestus | , marsh fleabane | BENSON, BURKE, CASS, CAVALIER, DIVIDE, EDDY, EMMONS, FOSTER, GRAND FORKS, KIDDER, MCINTOSH, MCLEAN, MOUNTRAIL, RAMSEY, SHERIDAN, STUTSMAN, WARD, WELLS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Senecio eremophilus | , desert ragwort | USDA | Map | |
| Compositae | Senecio integerrimus | , lambstongue ragwort | BARNES, BILLIINGS, BILLINGS, BOWMAN, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Senecio vulgaris | , old-man-in-the-Spring | STARK | NDSU, USDA | Map |
| Gramineae | Setaria glauca | BARNES, BOWMAN, BURLEIGH, CASS, DICKEY, EDDY, EMMONS, FOSTER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MERCER, MORTON, OLIVER, RAMSEY, RICHLAND, SIOUX, STARK, STUTSMAN, WALSH, WARD | DK1995, GFND, NDSU | Map | |
| Gramineae | Setaria italica | , foxtail millet | BOTTINEAU, EDDY, GOLDEN VALLEY, RANSOM, SIOUX | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Setaria macrostachya | GFND | Map | ||
| Gramineae | Setaria pumila | , yellow foxtail | BILLINGS, BOWMAN, BURLEIGH, CAVALIER, DICKEY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MERCER, MORTON, MOUNTRAIL, OLIVER, RENVILLE, SIOUX, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Gramineae | Setaria verticillata | , hooked bristlegrass | BURLEIGH, LAMOURE | NDSU, USDA | Map |
| Gramineae | Setaria viridis | , green bristlegrass | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NDSU, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Elaeagnaceae | Shepherdia argentea | , silver buffaloberry | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CAVALIER, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PEMBINA, PIERCE, RAMSEY, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS, WILLISTON | DK1995, GFND, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Elaeagnaceae | Shepherdia canadensis | , russet buffaloberry | BOTTINEAU, CAVALIER, DUNN, MCKENZIE, PEMBINA, ROLETTE, WARD | GFND, NDSU, MSU, NPWRC, USDA | Map |
| Rubiaceae | Sherardia orientalis | CASS | NDSU | Map | |
| Compositae | Shinnersoseris rostrata | , beaked skeletonweed | MCHENRY, RANSOM | GFND, GFND, NPWRC, USDA | Map |
| Rosaceae | Sibbaldiopsis tridentata | , shrubby fivefingers | BILILNGS, BILLINGS, CAVALIER | GFND, NDSU, NDSU, USDA | Map |
| Cucurbitaceae | Sicyos angulatus | , oneseed bur cucumber | USDA | Map | |
| Caryophyllaceae | Silene antirrhina | , sleepy silene | BILLINGS, EDDY, GRANT, KIDDER, MORTON, MOUNTRAIL, RICHLAND, SIOUX, STUTSMAN | DK1995, MSU, NDSU, NPWRC, USDA | Map |
| Caryophyllaceae | Silene csereii | , Balkan catchfly | BILLINGS, BURKE, CAVALIER, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRANT, KIDDER, LAMOURE, LOGAN, MCINSTOSH, MCINTOSH, MERCER, MORTON, MOUNTRAIL, SHERIDAN, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NPWRC, NDSU, USDA | Map |
| Caryophyllaceae | Silene dichotoma | , forked catchfly | HETTINGER, LAMOURE, SHERIDAN, WARD | GFND, NDSU, USDA | Map |
| Caryophyllaceae | Silene drummondii | , Drummond's campion | ADAMS, BENSON, BILLINGS, BURKE, DUNN, GRANT, LOGAN, MCKENZIE, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, WARD, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Caryophyllaceae | Silene noctiflora | , nightflowering silene | BURKE, DIVIDE, EDDY, EMMONS, KIDDER, LOGAN, MCLEAN, MOUNTRAIL, NELSON, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Caryophyllaceae | Silene pratensis | MORTON | GFND | Map | |
| Caryophyllaceae | Silene stellata | , widowsfrill | USDA | Map | |
| Caryophyllaceae | Silene vulgaris | , maidenstears | BOTTINEAU, BURKE, DIVIDE, EMMONS, GRAND FORKS, LAMOURE, MCKENZIE, SHERIDAN, STUTSMAN, WARD | GFND, MSU, NDSU, NPWRC, USDA, MSU, USDA | Map |
| Compositae | Silphium perfoliatum | , cup plant | USDA | Map | |
| Cruciferae | Sinapis alba | , white mustard | USDA | Map | |
| Cruciferae | Sinapis arvensis | , charlock mustard | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NPWRC, NDSU, USDA | Map |
| Cruciferae | Sisymbrium altissimum | , tall tumblemustard | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, ROLETTE, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS, WILLISM | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Sisymbrium incisum | GRAND FORKS, RANSOM | GFND | Map | |
| Cruciferae | Sisymbrium irio | MCHENRY | GFND | Map | |
| Cruciferae | Sisymbrium loeselii | , small tumbleweed mustard | BILLINGS, EDDY, GRAND FORKS, KIDDER, MCLEAN, RAMSEY, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cruciferae | Sisymbrium officinale | , hedgemustard | BENSON, BURKE, LAMOURE, MOUNTRAIL | GFND, MSU, NDSU, USDA | Map |
| Iridaceae | Sisyrinchium angustifolium | BILLINGS, EDDY, HETTINGER, MCKENZIE, NELSON, RICHLAND, SLOPE, STARK | DK1995, GFND, GFND, MSU | Map | |
| Iridaceae | Sisyrinchium campestre | GRAND FORKS, RANSOM, RICHLAND | GFND | Map | |
| Iridaceae | Sisyrinchium montanum | , strict blue-eyed grass | BARNES, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, RAMSEY, RICHLAND, SHERIDAN, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Iridaceae | Sisyrinchium mucronatum | , needletip blue-eyed grass | CAVALIER, GRAND FORKS, MCHENRY, RANSOM, SLOPE | GFND, USDA | Map |
| Umbelliferae | Sium suave | , hemlock waterparsnip | BARNES, BENSON, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, NELSON, RANSOM, ROLETTE, SHERIDAN, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Asparagaceae | Smilacina racemosa | GRAND FORKS, RANSOM, RICHLAND | GFND, NPWRC | Map | |
| Asparagaceae | Smilacina trifolia | GRAND FORKS | GFND | Map | |
| Smilacaceae | Smilax ecirrhata | , upright carrionflower | USDA | Map | |
| Smilacaceae | Smilax herbacea | BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, ROLETTE, SLOPE, STARCK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC | Map | |
| Smilacaceae | Smilax lasioneura | , Blue Ridge carrionflower | USDA | Map | |
| Smilacaceae | Smilax pulverulenta | BENSON | GFND | Map | |
| Solanaceae | Solanum dulcamara | , climbing nightshade | KIDDER, MOUNTRAIL, WELLS | NDSU, USDA | Map |
| Solanaceae | Solanum interius | , deadly nightshade | USDA | Map | |
| Solanaceae | Solanum lycopersicum | , garden tomato | USDA | Map | |
| Solanaceae | Solanum physalifolium | , hoe nightshade | BURLEIGH, DUNN, EMMONS, HETTINGER, KIDDER, LAMOURE, STARK | NDSU, USDA | Map |
| Solanaceae | Solanum ptycanthum | , West Indian nightshade | BENSON, BOWMAN, DICKEY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCLEAN, MERCER, MORTON, SHERIDAN, STARK, STUTSMAN, WELLS | GFND, NPWRC, NDSU, USDA | Map |
| Solanaceae | Solanum rostratum | , buffalobur nightshade | BARNES, BILLINGS, BOWMAN, BURLEIGH, DIVIDE, EMMONS, GOLDEN VALLEY, GRANT, MCKENZIE, MERCER, MORTON, SIOUX, SLOPE, STARK, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Solanaceae | Solanum sarrachoides | MORTON | GFND | Map | |
| Solanaceae | Solanum triflorum | , cutleaf nightshade | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, DK1995, MSU, MSU, NDSU, NPWRC, USDA | Map |
| Solanaceae | Solanum tuberosum | GRAND FORKS | GFND | Map | |
| Compositae | Solidago altissima | , Canada goldenrod | BURKE, CASS, DIVIDE, GRAND FORKS, MCHENRY, MERCER, MOUNTRAIL, RAMSEY, RANSOM, WARD | GFND, MSU, NDSU, USDA | Map |
| Compositae | Solidago canadensis | , Canada goldenrod | BARNES, BENSON, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, PIERCE, RAMSEY, RANSOM, RICHLAND, ROLETTE, SHERDIAN, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Solidago concinna | GFND | Map | ||
| Compositae | Solidago flexicaulis | , zigzag goldenrod | CAVALIER, STUTSMAN | GFND, USDA | Map |
| Compositae | Solidago gigantea | , giant goldenrod | BILLINGS, BOTTINEAU, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, PIERCE, RICHLAND, ROLETTE, SIOUX, SLOPE, STARK, STEELE, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Solidago graminifolia | BENSON, CASS, EDDY, GRAND FORKS, MCHENRY, RAMSEY, STUTSMAN, WALSH | GFND, NDSU, NPWRC | Map | |
| Compositae | Solidago missouriensis | , Missouri goldenrod | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SARGENT, SHERDIAN, SIOUX, SLOPE, STARK, STUTSMAN, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Solidago mollis | , velvety goldenrod | ADAMS, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, SHERDIAN, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Solidago nemoralis | , gray goldenrod | BENSON, BILLINGS, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MCLEAN, MORTON, MOUNTRAIL, OLIVER, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Solidago procera | BENSON | GFND | Map | |
| Compositae | Solidago rigida | ADAMS, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RENVILLE, SARGENT, SHERIDAN, SLOPE, STARK, STEELE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, USDA, MSU, NDSU, NPWRC | Map | |
| Compositae | Solidago speciosa | , showy goldenrod | USDA | Map | |
| Compositae | Sonchus arvensis | , field sowthistle | BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, ROLETTE, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Sonchus asper | , spiny sowthistle | BENSON, CASS, EDDY, GRAND FORKS, LAMOURE, MCHENRY, MCKENZIE, MERCER, MOUNTRAIL, WARD | DK1995, GFND, MSU, NDSU, USDA | Map |
| Compositae | Sonchus oleraceus | , common sowthistle | EDDY, GRAND FORKS, STARK, STUTSMAN, WARD | DK1995, GFND, MSU, NDSU, USDA | Map |
| Compositae | Sonchus uliginosus | GRAND FORKS, WARD | GFND | Map | |
| Leguminosae | Sophora nuttalliana | BENSON | GFND | Map | |
| Rosaceae | Sorbaria sorbifolia | GRAND FORKS | GFND | Map | |
| Rosaceae | Sorbus americana | WALSH | GFND | Map | |
| Rosaceae | Sorbus aucuparia | , European mountain ash | USDA | Map | |
| Rosaceae | Sorbus scopulina | , Greene's mountain ash | GRAND FORKS | GFND, USDA | Map |
| Gramineae | Sorghastrum nutans | , Indiangrass | DICKEY, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, PIERCE, RAMSEY, RANSOM, RICHLAND, STUTSMAN | DK1995, GFND, NPWRC, NDSU, NPWRC, USDA | Map |
| Gramineae | Sorghum bicolor | , sorghum | BURLEIGH | NDSU, USDA | Map |
| Gramineae | Sorghum halepense | , Johnsongrass | WILLIAMS | GFND, NDSU, USDA | Map |
| Typhaceae | Sparganium americanum | , American bur-reed | USDA | Map | |
| Typhaceae | Sparganium emersum | , European bur-reed | BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, FOSTER, GRAND FORKS, MCLEAN, MOUNTRAIL, OLIVER, STUTSMAN, TOWNER, WARD, WELLS, WILLIAMS | DK1995, GFND, NPWRC, NDSU, USDA | Map |
| Typhaceae | Sparganium eurycarpum | , broadfruit bur-reed | ADAMS, BARNES, BILLINGS, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RICHLAND, SLOPE, STARK, STUTSMAN, TRAILL, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Spartina cynosuroides | BENSON | GFND | Map | |
| Gramineae | Spartina gracilis | , alkali cordgrass | BENSON, BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, SHERIDAN, SLOPE, STARKS, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Gramineae | Spartina pectinata | , prairie cordgrass | ADAMS, BARNES, BILLINGS, BOWMAN, BURKE, BURLEIGH, BURLIEGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MCLEOD, MERCER, MOUNTRAIL, NELSON, OLIVER, PIERCE, RAMSEY, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, TOWNER, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NDSU, NPWRC, USDA | Map |
| Caryophyllaceae | Spergula arvensis | , corn spurry | USDA | Map | |
| Caryophyllaceae | Spergularia maritima | , media sandspurry | USDA | Map | |
| Caryophyllaceae | Spergularia salina | , salt sandspurry | DIVIDE, KIDDER, LAMOURE, RAMSEY, STUTSMAN, WARD | MSU, NPWRC, NDSU, USDA | Map |
| Malvaceae | Sphaeralcea coccinea | , scarlet globemallow | BARNES, BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Sphenopholis intermedia | , slender wedgescale | EDDY, GRAND FORKS, MCLEAN, MORTON, MOUNTRAIL, PIERCE, RANSOM, WILLIAMS | GFND, NDSU, USDA | Map |
| Gramineae | Sphenopholis nitida | STUTSMAN | GFND | Map | |
| Gramineae | Sphenopholis obtusata | , prairie wedgescale | BILLINGS, BURKE, BURLEIGH, DICKEY, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NDSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Spiraea alba | , white meadowsweet | ADAMS, BURKE, BURLEIGH, DIVIDE, EDDY, EMMONS, GRAND FORKS, KIDDER, LOGAN, MCLEAN, OLIVER, STUTSMAN, WALSH, WARD, WILLIAM, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rosaceae | Spiraea betulifolia | , white spirea | USDA | Map | |
| Rosaceae | Spiraea latifolia | RANSOM | GFND | Map | |
| Rosaceae | Spiraea rotundifolia | GRAND FORKS | GFND | Map | |
| Rosaceae | Spiraea salicifolia | BENSON, BOTTINEAU, GRAND FORKS, MCHENRY | GFND | Map | |
| Rosaceae | Spiraea spiraea | GRAND FORKS | GFND | Map | |
| Rosaceae | Spiraea vanhouttei | GRAND FORKS | GFND | Map | |
| Orchidaceae | Spiranthes cernua | KIDDER, RICHLAND | NPWRC | Map | |
| Orchidaceae | Spiranthes magnicamporum | , Great Plains lady's tresses | STUTSMAN | NDSU, USDA | Map |
| Orchidaceae | Spiranthes romanzoffiana | , hooded lady's tresses | BURKE | NDSU, USDA | Map |
| Araceae | Spirodela polyrrhiza | , common duckmeat | BARNES, CASS, EMMONS, GRAND FORKS, GRIGGS, PEMBINA, RICHLAND, STUTSMAN | GFND, NDSU, NPWRC, NDSU, USDA | Map |
| Gramineae | Sporobolus airoides | , alkali sacaton | BILLINGS, GOLDEN VALLEY | GFND, NDSU, USDA | Map |
| Gramineae | Sporobolus asper | EDDY, GRAND FORKS, SARGENT | DK1995, GFND, NPWRC | Map | |
| Gramineae | Sporobolus compositus | , composite dropseed | DICKEY, EMMONS, GRANT, KIDDER, MERCER | NDSU, USDA | Map |
| Gramineae | Sporobolus contractus | EDDY, MCHENRY, RICHLAND | NDSU | Map | |
| Gramineae | Sporobolus cryptandrus | , sand dropseed | BILLINGS, BOWMAN, BURKE, BURLEIGH, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Sporobolus heterolepis | , prairie dropseed | BILLINGS, BURKE, DICKEY, DIVIDE, DUNN, EDDY, GRAND FORKS, GRAND FORSK, GRANT, KIDDER, LAMOURE, MCHENRY, MOUNTRAIL, RANSOM, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Gramineae | Sporobolus neglectus | , puffsheath dropseed | BILLINGS, BURLEIGH, EMMONS, GRANT, KIDDER, SIOUX, STARK, STUTSMAN, WILLIAMS | GFND, NDSU, USDA | Map |
| Gramineae | Sporobolus vaginiflorus | , poverty dropseed | USDA | Map | |
| Labiatae | Stachys brevidens | GRAND FORKS | GFND | Map | |
| Labiatae | Stachys palustris | BENSON, BOTTINEAU, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC | Map | |
| Labiatae | Stachys pilosa | , hairy hedgenettle | USDA | Map | |
| Labiatae | Stachys puberula | GRAND FORKS | GFND | Map | |
| Labiatae | Stachys tenuifolia | , smooth hedgenettle | USDA | Map | |
| Cruciferae | Stanleya pinnata | , desert princesplume | BILLINGS, GOLDEN VALLEY, SLOPE | GFND, NDSU, NPWRC, USDA | Map |
| Apocynaceae | Stapelia variegata | CASS | NDSU | Map | |
| Caryophyllaceae | Stellaria aquatica | GRAND FORKS | GFND | Map | |
| Caryophyllaceae | Stellaria crassifolia | , fleshy starwort | BURKE, LOGAN, WARD, WILLIAMS | MSU, NDSU, USDA | Map |
| Caryophyllaceae | Stellaria graminea | , grass-like starwort | USDA | Map | |
| Caryophyllaceae | Stellaria longifolia | , longleaf starwort | BENSON, BURKE, BURLEIGH, DICKEY, EDDY, GRAND FORKS, MOUNTRAIL, OLIVER, STUTSMAN, WALSH, WARD | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Caryophyllaceae | Stellaria longipes | , longstalk starwort | BURKE, GRAND FORKS, RICHLAND, STUTSMAN, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Caryophyllaceae | Stellaria media | , common chickweed | BILLINGS, BURLEIGH, DICKEY, EMMONS, GOLDEN VALLEY, GRAND FORKS, HETTINGER, KIDDER, LAMOURE, SHERIDAN, STARK, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Caryophyllaceae | Stellaria umbellata | GFND | Map | ||
| Compositae | Stenotus armerioides | , thrift mock goldenweed | ADAMS, BOWMAN, DUNN, GOLDEN VALLEY, GRANT, MOUNTRAIL, SLOPE, WILLIAMS | GFND, GFND, MSU, NDSU, USDA | Map |
| Compositae | Stephanomeria minor | , lesser wirelettuce | USDA | Map | |
| Compositae | Stephanomeria runcinata | , desert wirelettuce | BILLINGS, SLOPE | GFND, USDA | Map |
| Gramineae | Stiporyzopsis johnsonii | BURLEIGH | NDSU | Map | |
| Leguminosae | Strophostyles leiosperma | , slickseed fuzzybean | EMMONS, GRANT, HETTINGER, MORTON, RANSOM | GFND, NDSU, USDA | Map |
| Potamogetonaceae | Stuckenia filiformis | , fineleaf pondweed | KIDDER, RAMSEY | GFND, NDSU, NDSU, USDA | Map |
| Potamogetonaceae | Stuckenia pectinata | , sago pondweed | BARNES, BILLINGS, BOWMAN, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRIGGS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, RAMSEY, SLOPE, STARK, STUTSMAN, TOWNER, WARD, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Potamogetonaceae | Stuckenia vaginata | , sheathed pondweed | BOTTINEAU, GRAND FORKS, KIDDER, MOUNTRAIL, OLIVER | GFND, NPWRC, MSU, USDA | Map |
| Amaranthaceae | Suaeda calceoliformis | , Pursh seepweed | BENSON, BILLINGS, BOWMAN, BURLEIGH, DIVIDE, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, RAMSEY, SHERIDAN, SIOUX, SLOPE, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Amaranthaceae | Suaeda moquinii | , Mojave seablite | BILLINGS, BURLEIGH, GOLDEN VALLEY, GRANT, MCKENZIE, MOUNTRAIL, SLOPE, STARK, WILLIAMS | GFND, NPWRC, NDSU, USDA | Map |
| Amaranthaceae | Suckleya suckleyana | , poison suckleya | STARK | NDSU, USDA | Map |
| Caprifoliaceae | Symphoricarpos albus | , common snowberry | BARNES, BARNES-RANSOM, BOTTINEAU, BURKE, CAVALIER, DIVIDE, DUNN, EDDY, GRAND FORKS, MCLEAN, MOUNTRAIL, PEMBINA, PEMBINE, ROLETTE, STARK, STEELE, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, USDA | Map |
| Caprifoliaceae | Symphoricarpos occidentalis | , western snowberry | ADAMS, BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, DIVIDE, DUNN, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, PEMBINA, PIERCE, RAMSEY, RANSOM, RENVILLE, RICHLAND, ROLETTE, SARGENT, SIOUX, SLOPE, STARK, STEELE, STUTSMAN, TRAILL, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Symphyotrichum amethystinum | USDA | Map | ||
| Compositae | Symphyotrichum ascendens | GRAND FORKS | GFND | Map | |
| Compositae | Symphyotrichum boreale | , northern bog aster | BENSON, BURKE, EDDY, EMMONS, GRAND FORKS, KIDDER, LOGAN, MOUNTRAIL, RANSOM, STUTSMAN | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Symphyotrichum ciliatum | , rayless alkali aster | BENSON, BILLINGS, BURKE, BURLEIGH, CASS, EDDY, EMMONS, GRAND FORKS, HETTINGER, KIDDER, LOGAN, MCINTOSH, MOUNTRAIL, RAMSEY, SHERIDAN, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Symphyotrichum ciliolatum | , Lindley's aster | BOTTINEAU, ROLETTE, WALSH | GFND, USDA | Map |
| Compositae | Symphyotrichum cordifolium | GRAND FORKS, ROLETTE | GFND, NPWRC | Map | |
| Compositae | Symphyotrichum ericoides | , white heath aster | BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, HETTINGER, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Symphyotrichum falcatum | , white prairie aster | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, SIOUX, SLOPE, STARK, WARD, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, USDA | Map |
| Compositae | Symphyotrichum laeve | , smooth blue aster | BENSON, BILLINGS, BILLLINGS, BOTTINEAU, BURKE, BURLEIGH, CASS, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, MCHENRY, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Symphyotrichum lanceolatum | , white panicle aster | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Symphyotrichum lowrieanum | BOTTINEAU | GFND | Map | |
| Compositae | Symphyotrichum novae-angliae | , New England aster | BENSON, EDDY, MCHENRY, RANSOM, RICHLAND | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Compositae | Symphyotrichum oblongifolium | , aromatic aster | BILLINGS, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCKENZIE, MCLEAN, MOUNTRAIL, RENVILLE, SHERIDAN, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NDSU, NPWRC, MSU, NDSU, USDA | Map |
| Compositae | Symphyotrichum praealtum | GRAND FORKS, PIERCE, WARD | GFND, MSU | Map | |
| Compositae | Symphyotrichum prenanthoides | GRAND FORKS | GFND | Map | |
| Compositae | Symphyotrichum puniceum | , purplestem aster | EDDY, RICHLAND | DK1995, NPWRC, USDA | Map |
| Compositae | Symphyotrichum sericeum | , western silver aster | RANSOM | GFND, USDA | Map |
| Boraginaceae | Symphytum officinale | CASS | NDSU | Map | |
| Oleaceae | Syringa chinensis | TRAILL | GFND | Map | |
| Oleaceae | Syringa vulgaris | BENSON, GRAND FORKS, MCLEAN, MOUNTRAIL, STUTSMAN, TRAILL | GFND, NDSU, NPWRC | Map | |
| Tamaricaceae | Tamarix ramosissima | , saltcedar | USDA | Map | |
| Compositae | Tanacetum balsamita | CASS | NDSU | Map | |
| Compositae | Tanacetum vulgare | , common tansy | BURKE, CASS, GRAND FORKS, KIDDER, LAMOURE, MOUNTRAIL, PEMBINA, RAMSEY, STUTSMAN, WARD | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Taraxacum laevigatum | , rock dandelion | BILLINGS, BURKE, DIVIDE, EDDY, GRAND FORKS, MCINTOSH, MOUNTRAIL, OLIVER, SLOPE, WILLIAMS | DK1995, GFND, NDSU, USDA | Map |
| Compositae | Taraxacum officinale | , common dandelion | ADAMS, BARNES, BENSON, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LOGAN, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, NELSON, RAMSEY, RICHLAND, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Taxaceae | Taxus brevifolia | CASS | NDSU | Map | |
| Taxaceae | Taxus canadensis | GRAND FORKS | GFND | Map | |
| Taxaceae | Taxus media | CASS | NDSU | Map | |
| Bignoniaceae | Tecoma stans | CASS | NDSU | Map | |
| Aizoaceae | Tetragonia tetragonioides | , New Zealand spinach | USDA | Map | |
| Compositae | Tetraneuris acaulis | , stemless four-nerve daisy | BILLINGS, BOWMAN, GOLDEN VALLEY, GRANT, HETTINGER, MCKENZIE, SLOPE, STARK, WILLIAMS | GFND, NPWRC, NDSU, USDA | Map |
| Compositae | Tetraneuris torreyana | DUNN | NDSU | Map | |
| Labiatae | Teucrium canadense | , Canada germander | BOWMAN, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, HETTINGER, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, STUTSMAN, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Labiatae | Teucrium occidentale | BENSON, CAVALIER, GRAND FORKS | GFND | Map | |
| Ranunculaceae | Thalictrum dasycarpum | , purple meadow-rue | BENSON, BILLINGS, BURKE, BURLEIGH, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, SHERIDAN, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ranunculaceae | Thalictrum dioicum | , early meadow-rue | WILLIAMS | GFND, NDSU, USDA | Map |
| Ranunculaceae | Thalictrum venulosum | , veiny meadow-rue | BENSON, BILLINGS, BURKE, CAVALIER, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, LAMOURE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, ROLETTE, SLOPE, STUTSMAN, TOWNER, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Umbelliferae | Thaspium trifoliatum | NELSON | GFND | Map | |
| Compositae | Thelesperma subnudum | , Navajo tea | DIVIDE | MSU, USDA | Map |
| Cruciferae | Thelypodium integrifolium | , entireleaved thelypody | BURLEIGH, KIDDER, MCLEAN, WARD | NDSU, NPWRC, USDA | Map |
| Polypodiaceae | Thelypteris palustris | , eastern marsh fern | KIDDER, MCHENRY, RANSOM, RICHLAND | GFND, NDSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Thermopsis divaricarpa | BILLINGS, BOWMAN, BURKE, DIVIDE, DUNN, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, LOGAN, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, SLOPE, STARK, WARD, WILLIAMS | NDSU | Map | |
| Leguminosae | Thermopsis rhombifolia | , prairie thermopsis | BILLINGS, DUNN, MORTON, MOUNTRAIL, SLOPE, STARK, WARD, WILLIAMS | GFND, GFND, MSU, NPWRC, USDA | Map |
| Santalaceae | Thesium arvense | , thesium | USDA | Map | |
| Santalaceae | Thesium linophyllon | EDDY | DK1995 | Map | |
| Gramineae | Thinopyrum intermedium | , intermediate wheatgrass | CASS, MERCER, OLIVER, RAMSEY, STUTSMAN | GFND, NPWRC, NDSU, USDA | Map |
| Gramineae | Thinopyrum ponticum | , tall wheatgrass | BILLINGS, EDDY, EMMONS, LAMOURE, MERCER, OLIVER, RAMSEY, STUTSMAN | DK1995, GFND, NPWRC, NDSU, USDA | Map |
| Cruciferae | Thlaspi arvense | , field pennycress | ADAMS, BILLINGS, BOTTINEAU, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Cupressaceae | Thuja occidentalis | GRAND FORKS | GFND | Map | |
| Malvaceae | Tilia americana | , American basswood | EMMONS, GRAND FORKS, OLIVER, RANSOM, RICHLAND, TRAILL, WALSH, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Malvaceae | Tilia europaea | GFND | Map | ||
| Compositae | Townsendia exscapa | , stemless Townsend daisy | BILLINGS, BURKE, DIVIDE, DUNN, GOLDEN VALLEY, MCKENZIE, MCLEAN, MORTON, SLOPE, STARK | MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Townsendia hookeri | , Hooker's Townsend daisy | BILLINGS, WILLIAMS | NDSU, USDA | Map |
| Anacardiaceae | Toxicodendron rydbergii | , western poison ivy | EDDY, RANSOM, WARD | DK1995, GFND, MSU, USDA | Map |
| Anacardiaceae | Toxicodendron toxicarium | BILLINGS | GFND | Map | |
| Commelinaceae | Tradescantia bracteata | , longbract spiderwort | BARNES, BILLINGS, BURLEIGH, CASS, DICKEY, DUNN, EMMONS, GRANT, LAMOURE, LOGAN, MCHENRY, MCKENZIE, MORTON, RANSOM, RICHLAND, SARGENT, SIOUX, SLOPE, STUTSMAN | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Commelinaceae | Tradescantia occidentalis | , prairie spiderwort | BILLINGS, BOWMAN, BURKE, CASS, DUNN, EMMONS, GRANT, KIDDER, MCHENRY, MCINTOSH, MCKENZIE, MERCER, MORTON, RANSOM, RICHLAND, SARGENT, SIOUX, SLOPE, STARK, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Tragopogon dubius | , yellow salsify | BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, GRIGGS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RANSOM, RICHLAND, SHERIDAN, SIOUX, SLOPE, STARK, STEELE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Compositae | Tragopogon lamottei | BILLINGS, BURKE, DICKEY, DIVIDE, DUNN, HETTINGER, MCKENZIE, MOUNTRAIL, STARK, WARD, WILLIAMS | NDSU | Map | |
| Compositae | Tragopogon porrifolius | GRAND FORKS, RANSOM | GFND | Map | |
| Compositae | Tragopogon pratensis | CASS, CAVALIER, EDDY, GRAND FORKS, MCHENRY | GFND, NDSU | Map | |
| Tofieldiaceae | Triantha glutinosa | , sticky tofieldia | USDA | Map | |
| Zygophyllaceae | Tribulus terrestris | , puncturevine | USDA | Map | |
| Leguminosae | Trifolium arvense | , rabbitfoot clover | USDA | Map | |
| Leguminosae | Trifolium campestre | , field clover | WARD | MSU, USDA | Map |
| Leguminosae | Trifolium dubium | , suckling clover | GRAND FORKS | GFND, USDA | Map |
| Leguminosae | Trifolium fragiferum | , strawberry clover | USDA | Map | |
| Leguminosae | Trifolium hybridum | , alsike clover | BENSON, BURKE, EDDY, LAMOURE, SIOUX, STARK, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, USDA | Map |
| Leguminosae | Trifolium incarnatum | , crimson clover | USDA | Map | |
| Leguminosae | Trifolium pratense | , red clover | BENSON, BURKE, BURLEIGH, CASS, DICKEY, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, ROLETTE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Trifolium repens | , white clover | BARNES, BURKE, CASS, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MCLEAN, MERCER, MORTON, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Trifolium resupinatum | , reversed clover | USDA | Map | |
| Juncaginaceae | Triglochin concinna | BILLINGS, BOWMAN, DIVIDE, GOLDEN VALLEY, KIDDER, LOGAN, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, SIOUX, SLOPE, STARK, WARD, WILLIAMS | NDSU | Map | |
| Juncaginaceae | Triglochin maritima | , seaside arrowgrass | BENSON, BILLINGS, BURKE, CAVALIER, DICKEY, DIVIDE, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MERCER, MOUNTRAIL, RICHLAND, SARGENT, SHERIDAN, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Juncaginaceae | Triglochin maritimum | STUTSMAN | NPWRC | Map | |
| Juncaginaceae | Triglochin palustris | , marsh arrowgrass | BILLINGS, BURKE, DIVIDE, EDDY, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, MORTON, MOUNTRAIL, SLOPE, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Melanthiaceae | Trillium cernuum | , whip-poor-will flower | EDDY, GRAND FORKS, RICHLAND, ROLETTE, WALSH | GFND, GFND, NPWRC, USDA | Map |
| Melanthiaceae | Trillium erectum | RANSOM | GFND | Map | |
| Campanulaceae | Triodanis leptocarpa | , slimpod Venus' looking-glass | DUNN, EMMONS, MCKENZIE, MORTON, SIOUX, SLOPE | NDSU, NPWRC, USDA | Map |
| Campanulaceae | Triodanis perfoliata | , clasping Venus' looking-glass | BILLINGS, GRANT, PIERCE | GFND, NDSU, USDA | Map |
| Gramineae | Triplasis purpurea | , purple sandgrass | RANSOM | NDSU, USDA | Map |
| Compositae | Tripleurospermum maritimum | BURKE, MERCER, WARD | NDSU | Map | |
| Compositae | Tripleurospermum perforatum | , scentless false mayweed | USDA | Map | |
| Nyctaginaceae | Tripterocalyx micranthus | , smallflower sandverbena | BILLINGS, BOWMAN, GOLDEN VALLEY, MCKENZIE, MORTON, SLOPE | GFND, NDSU, USDA | Map |
| Gramineae | Triticum aestivum | CASS, EDDY, GRAND FORKS, HETTINGER, KIDDER, LOGAN, MCINTOSH, MERCER, MOUNTRAIL, NELSON, RENVILLE, STARK | DK1995, GFND, MSU, NDSU | Map | |
| Gramineae | Triticum durum | CASS, GRAND FORKS | GFND, NDSU | Map | |
| Typhaceae | Typha angustifolia | , narrowleaf cattail | BILLINGS, BURLEIGH, CASS, DICKEY, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, GRIGGS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCLEAN, MERCER, NELSON, OLIVER, RAMSEY, RANSOM, RICHLAND, STUTSMAN, WARD, WELLS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Typhaceae | Typha glauca | BOWMAN, DICKEY, EDDY, EMMONS, FOSTER, MCINTOSH, MCKENZIE, STUTSMAN, WELLS | DK1995, NDSU, NDSU, NPWRC | Map | |
| Typhaceae | Typha latifolia | , broadleaf cattail | BARNES, BILLINGS, BOWMAN, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, EDDY, EMMONS, FOSTER, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RAMSEY, RICHLAND, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Ulmaceae | Ulmus americana | , American elm | BILLINGS, BURKE, BURLEIGH, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, ROLETTE, SLOPE, STARK, STUTSMAN, WARD, WELLS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Ulmaceae | Ulmus parvifolia | MORTON | GFND | Map | |
| Ulmaceae | Ulmus pumila | , Siberian elm | BURLEIGH, DICKEY, EDDY, EMMONS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MERCER, MORTON, MOUNTRAIL, STARK, WALSH, WELLS, WILLIAMS | DK1995, GFND, NDSU, USDA | Map |
| Ulmaceae | Ulmus rubra | , slippery elm | GRAND FORKS | GFND, USDA | Map |
| Ulmaceae | Ulmus thomasii | , rock elm | USDA | Map | |
| Urticaceae | Urtica dioica | , stinging nettle | BARNES, BILLINGS, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MOUNTRAIL, RICHLAND, SLOPE, STARK, STUTSMAN, TRAIL, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Urticaceae | Urtica procera | GRAND FORKS, STUTSMAN | GFND, NPWRC | Map | |
| Lentibulariaceae | Utricularia intermedia | , flatleaf bladderwort | BENSON, EDDY, MCHENRY | DK1995, GFND, NPWRC, USDA | Map |
| Lentibulariaceae | Utricularia macrorhiza | , common bladderwort | BARNES, BENSON, BOTTINEAU, BURKE, CASS, CAVALIER, EDDY, FOSTER, GRAND FORKS, GRIGGS, MCHENRY, MCLEAN, MOUNTRAIL, NELSON, PEMBINA, PIERCE, RAMSEY, RANSOM, RICHLAND, ROLETTE, SARGENT, STEELE, STUTSMAN, TRAILL, WALSH | DK1995, GFND, NDSU, NPWRC, MSU, USDA | Map |
| Lentibulariaceae | Utricularia minor | , lesser bladderwort | BARNES, MCHENRY, STUTSMAN | GFND, NDSU, NPWRC, USDA | Map |
| Colchicaceae | Uvularia grandiflora | , largeflower bellwort | RANSOM, RICHLAND, ROLETTE | GFND, NPWRC, USDA | Map |
| Colchicaceae | Uvularia sessilifolia | , sessileleaf bellwort | GFND, USDA | Map | |
| Caryophyllaceae | Vaccaria hispanica | , cow soapwort | BENSON, BILLINGS, GOLDEN VALLEY, GRANT, MORTON, MOUNTRAIL, RANSOM, SLOPE, STUTSMAN, WARD, WELLS, WILLIAMS | GFND, MSU, NDSU, USDA | Map |
| Hydrocharitaceae | Vallisneria americana | , American eelgrass | GRAND FORKS | GFND, USDA | Map |
| Scrophulariaceae | Verbascum blattaria | , moth mullein | CASS | NDSU, USDA | Map |
| Scrophulariaceae | Verbascum thapsus | , common mullein | CASS, CAVALIER, RICHLAND, ROLETTE, SARGENT, STUTSMAN, TRAILL, WALSH, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Verbenaceae | Verbena bracteata | , bigbract verbena | BARNES, BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, BURLEIGH, CASS, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, OLIVER, RICHLAND, SARGENT, SARGENT`, SIOUX, SLOPE, STARK, STUSTMAN, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Verbenaceae | Verbena hastata | , swamp verbena | BOTTINEAU, BURKE, BURLEIGH, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MCLEAN, MERCER, MORTON, OLIVER, RANSOM, RICHLAND, ROLETTE, SARGENT, SIOUX, STARK, STUTSMAN, WALSH, WARD, WELLS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Verbenaceae | Verbena rigida | , tuberous vervain | USDA | Map | |
| Verbenaceae | Verbena stricta | , hoary verbena | DICKEY, EMMONS, LAMOURE, MCINTOSH, RICHLAND, STUTSMAN, TRAILL | GFND, NDSU, NPWRC, USDA | Map |
| Verbenaceae | Verbena urticifolia | , white vervain | BURLEIGH, DICKEY, EDDY, GRAND FORKS, LAMOURE, LOGAN, RICHLAND, SHERIDAN-WELLS, STUTSMAN, WALSH, WELLS | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Compositae | Verbesina encelioides | , golden crownbeard | BILLINGS | GFND, USDA | Map |
| Compositae | Vernonia baldwinii | GRAND FORKS | GFND | Map | |
| Compositae | Vernonia fasciculata | , prairie ironweed | BENSON, BURLEIGH, CASS, DICKEY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCHENRY, MCINTOSH, MORTON, OLIVER, SIOUX, STUTSMAN, WARD | GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Veronica americana | , American speedwell | BARNES, BILLINGS, EDDY, GRAND FORKS, MCHENRY, PEMBINA, RANSOM, RICHLAND, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Veronica anagallis-aquatica | , water speedwell | BARNES, BENSON, BOTTINEAU, BURKE, CASS, CAVALIER, EDDY, GRAND FORKS, GRIGGS, RANSOM, RICHLAND, ROLETTE, TRAILL, WALSH | DK1995, GFND, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Plantaginaceae | Veronica maritima | MCHENRY | NDSU | Map | |
| Plantaginaceae | Veronica officinalis | , common gypsyweed | USDA | Map | |
| Plantaginaceae | Veronica peregrina | , neckweed | BARNES, BENSON, BOTTINEAU, BURKE, CASS, CAVALIER, EDDY, MOUNTRAIL, PIERCE, RAMSEY, RICHLAND, STEELE, STUTSMAN, TRAILL, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Plantaginaceae | Veronica scutellata | , skullcap speedwell | BENSON, BOTTINEAU | GFND, NDSU, USDA | Map |
| Plantaginaceae | Veronica serpyllifolia | , thymeleaf speedwell | USDA | Map | |
| Plantaginaceae | Veronica spicata | MCHENRY | NDSU | Map | |
| Scrophulariaceae | Veronicastrum virginicum | , Culver's root | GRAND FORKS | GFND, USDA | Map |
| Caprifoliaceae | Viburnum alnifolium | GRAND FORKS | GFND | Map | |
| Caprifoliaceae | Viburnum ellipticum | , common viburnum | USDA | Map | |
| Caprifoliaceae | Viburnum lentago | , nannyberry | BARNES, BARNES-RANSOM, BOTTINEAU, BURKE, CASS, DUNN, EDDY, GRAND FORKS, GRIGGS, MCHENRY, MOUNTRAIL, NELSON, PEMBINA, RAMSEY, RANSOM, RENVILLE, RICHLAND, ROLETTE, SARGENT, STARK, STEELE, STUTSMAN, WALSH, WARD | GFND, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Caprifoliaceae | Viburnum opulus | , European cranberrybush | BARNES, BENSON, BOTTINEAU, CASS, GRAND FORKS, MCHENRY, PEMBINA, RAMSOM, RICHLAND-RANSOM, ROLETTE, ROLLETTE, WALSH, WARD | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Caprifoliaceae | Viburnum prunifolium | WARD | GFND | Map | |
| Caprifoliaceae | Viburnum pubescens | PEMBINA, ROLETTE | GFND, NDSU | Map | |
| Caprifoliaceae | Viburnum rafinesqueanum | , downy arrowwood | GRAND FORKS | GFND, USDA | Map |
| Caprifoliaceae | Viburnum rafinesquianum | CASS, CAVALIER, GRAND FORKS, PEMBINA, ROLETTE, WALSH | GFND, GFND, NDSU, NPWRC | Map | |
| Caprifoliaceae | Viburnum trilobum | BARNES, BOTTINEAU, CAVALIER, GRAND FORKS, PEMBINA, RANSOM, WALSH | GFND, NDSU | Map | |
| Leguminosae | Vicia americana | , American vetch | BENSON, BILILNGS, BILLINGS, BOTTINEAU, BOWMAN, BOWMAN`, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MCLEAND, MERCER, MORTON, MOUNTRAIL, OLICER, OLIVER, RANSOM, RICHLAND, ROLETTE, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Leguminosae | Vicia angustifolia | GRAND FORKS | GFND, GFND | Map | |
| Leguminosae | Vicia cracca | GRAND FORKS | GFND | Map | |
| Leguminosae | Vicia linearis | BENSON, GRAND FORKS, RANSOM | GFND | Map | |
| Leguminosae | Vicia sativa | , garden vetch | DICKEY, DUNN, GOLDEN VALLEY, MCKENZIE, MERCER, SLOPE, STARK, STUTSMAND | NDSU, USDA | Map |
| Leguminosae | Vicia sparsifolia | BILLINGS, BOTTINEAU, GRAND FORKS, SLOPE, WALSH | GFND, GFND | Map | |
| Leguminosae | Vicia villosa | , winter vetch | USDA | Map | |
| Leguminosae | Vigna unguiculata | GRAND FORKS | GFND | Map | |
| Violaceae | Viola adunca | , hookedspur violet | BILLINGS, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, GOLDEN VALLEY, GRAND FORKS, GRANT, LOGAN, MCLEAN, MERCER, MOUNTRAIL, OLIVER, SHERIDAN, SIOUX, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Violaceae | Viola bernardii | USDA | Map | ||
| Violaceae | Viola blanda | , sweet white violet | USDA | Map | |
| Violaceae | Viola canadensis | , Canadian white violet | BENSON, BILLINGS, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, MCHENRY, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, RANSOM, ROLETTE, ROLLETTE, SLOPE, STUTSMAN, TRAILL, WALSH, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Violaceae | Viola eriocarpa | GRAND FORKS, RICHLAND, WALSH | GFND | Map | |
| Violaceae | Viola labradorica | , alpine violet | BILLINGS, GRAND FORKS | GFND, NDSU, USDA | Map |
| Violaceae | Viola macloskeyi | , small white violet | USDA | Map | |
| Violaceae | Viola nephrophylla | , northern bog violet | BARNES, BENSON, BURKE, DIVIDE, EDDY, EMMONS, KIDDER, MCINTOSH, MCLEAN, MOUNTRAIL, SLOPE, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, NPWRC, USDA | Map |
| Violaceae | Viola nuttallii | , Nuttall's violet | BENSON, BILLINGS, BOTTINEAU, BOWMAN, BURKE, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCLEAN, MERCER, MORTON, MOUNTRAIL, OLIVER, SLOPE, STARK, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Violaceae | Viola palmata | GRAND FORKS | GFND | Map | |
| Violaceae | Viola pedata | GRAND FORKS | GFND | Map | |
| Violaceae | Viola pedatifida | , prairie violet | BENSON, BILLINGS, BURKE, DICKEY, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, OLIVER, RAMSEY, RANSOM, RICHLAND, SIOUX, SLOPE, STARK, STUSTMAN, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Violaceae | Viola pensylvanica | GRAND FORKS | GFND | Map | |
| Violaceae | Viola pubescens | , downy yellow violet | EDDY, GRAND FORKS, RICHLAND, WARD | DK1995, GFND, MSU, NPWRC, USDA | Map |
| Violaceae | Viola rugulosa | BOTTINEAU, CAVALIER, DUNN, GOLDEN VALLEY, GRAND FORKS, LOGAN, RICHLAND, STUTSMAN, WALSH | GFND, GFND, NDSU | Map | |
| Violaceae | Viola scabriuscula | ROLETTE | GFND | Map | |
| Violaceae | Viola sempervirens | DUNN | NDSU | Map | |
| Violaceae | Viola sororia | , common blue violet | BURLEIGH, DICKEY, DIVIDE, EMMONS, GRAND FORKS, GRANT, LAMOURE, MCHENRY, RICHLAND, ROLETTE, SLOPE, STUTSMAN | GFND, GFND, MSU, NDSU, USDA | Map |
| Violaceae | Viola vallicola | , sagebrush violet | BENSON | GFND, USDA | Map |
| Vitaceae | Vitis riparia | , riverbank grape | BILLINGS, BURLEIGH, DUNN, EMMONS, GRANT, KIDDER, LAMOURE, MCLEAN, MORTON, OLIVER, STUTSMAN, WALSH, WARD, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Vitaceae | Vitis vulpina | BURLEIGH, GRAND FORKS, RANSOM, RICHLAND | GFND | Map | |
| Gramineae | Vulpia octoflora | , sixweeks fescue | BILLINGS, BURKE, BURLEIGH, DIVIDE, DUNN, EDDY, EMMONS, GRANT, KIDDER, MCINTOSH, MCKENZIE, MERCER, MORTON, MOUNTRAIL, OLIVER, RICHLAND, SLOPE, STARK, STUTSMAN, WILLIAMS | DK1995, GFND, NPWRC, MSU, NDSU, USDA | Map |
| Araceae | Wolffia columbiana | , Columbian watermeal | USDA | Map | |
| Polypodiaceae | Woodsia oregana | , Oregon cliff fern | BILLINGS, STARK | NDSU, NPWRC, USDA | Map |
| Compositae | Xanthium spinosum | LAMOURE | GFND | Map | |
| Compositae | Xanthium strumarium | , rough cocklebur | BENSON, BILLINGS, BOWMAN, BURKE, BURLEIGH, CASS, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GOLDEN VALLEY, GRAND FORKS, GRANT, KIDDER, LAMOURE, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MERCER, MORTON, MOUNTRAIL, RAMSEY, SIOUX, SLOPE, STARK, STUTSMAN, WALSH, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Asparagaceae | Yucca glauca | , soapweed yucca | BILLINGS, BURLEIGH, DUNN, EMMONS, GOLDEN VALLEY, GRANT, HETTINGER, MCKENZIE, MORTON, OLIVER, SIOUX, SLOPE, STARK, STARKS, WILLIAMS | GFND, MSU, NDSU, NPWRC, USDA | Map |
| Potamogetonaceae | Zannichellia palustris | , horned pondweed | BILLINGS, BOWMAN, BURKE, DICKEY, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MCINTOSH, MERCER, MORTON, MOUNTRAIL, NELSON, OLIVER, SLOPE, STARK, STUTSMAN, TRAILL, WARD, WILLIAMS | DK1995, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Rutaceae | Zanthoxylum americanum | , common pricklyash | GRAND FORKS, RICHLAND | GFND, GFND, NPWRC, USDA | Map |
| Melanthiaceae | Zigadenus chloranthus | GRAND FORKS, KIDDER, MCHENRY | GFND, NDSU | Map | |
| Melanthiaceae | Zigadenus elegans | , mountain deathcamas | BENSON, BOWMAN, BURKE, BURLEIGH, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LOGAN, MCINTOSH, MCKENZIE, MCLEAN, MOUNTRAIL, OLIVER, RANSOM, SHERIDAN, SLOPE, STUTSMAN, WALSH, WARD, WELLS, WILLIAMS | DK1995, GFND, GFND, NDSU, MSU, NDSU, NPWRC, USDA | Map |
| Melanthiaceae | Zigadenus glaucus | SHERIDAN | GFND | Map | |
| Melanthiaceae | Zigadenus gramineus | DIVIDE, WILLIAMS | GFND, MSU | Map | |
| Melanthiaceae | Zigadenus venenosus | , meadow deathcamas | DIVIDE, DUNN, EDDY, SHERIDAN, SLOPE, WARD, WILLIAMS | DK1995, NDSU, MSU, USDA | Map |
| Gramineae | Zizania aquatica | EDDY, EMMONS, GRAND FORKS, LAMOURE, RANSOM, STUTSMAN | DK1995, GFND, NDSU, NPWRC | Map | |
| Gramineae | Zizania palustris | , northern wildrice | USDA | Map | |
| Umbelliferae | Zizia aptera | , meadow zizia | BENSON, BOTTINEAU, BURKE, BURLEIGH, CAVALIER, DICKEY, DIVIDE, DUNN, EDDY, EMMONS, GRAND FORKS, KIDDER, LAMOURE, MCHENRY, MCINTOSH, MCKENZIE, MCLEAN, MOUNTRAIL, RICHLAND, SHERIDAN, STUTSMAN, WARD, WILLIAMS | DK1995, GFND, GFND, MSU, NDSU, NPWRC, USDA | Map |
| Umbelliferae | Zizia aurea | , golden zizia | BENSON, EDDY, GRAND FORKS, KIDDER, LAMOURE, MCHENRY, RICHLAND, ROLETTE, STUSTMAN, STUTSMAN, WALSH | DK1995, GFND, NDSU, NPWRC, USDA | Map |
| Family | Species | Counties | Source | Extra info |
The checklist is a compilation from multiple sources:
| Abbreviation | Reference |
|---|---|
| DK1995 | DeKeyser, E.S. 1995. Vascular flora of Camp Grafton South in Eddy County, North Dakota. Thesis (M.S.)--North Dakota State University, 1995. |
| GFND | Database of UND herbarium (GFND), 2010-12-26 |
| MSU | Database of MSU herbarium (Minot, ND), 2012-01-17 |
| NDSU | Database of NDSU herbarium (NDSU), 2011-12-08 |
| NPWRC | Database of NPWRC herbarium, 2001-07-13 |
| USDA | USDA PLANT database, North Dakota search, 2012-01-23 |
Slanted font used for the sources where given species represented with synonym.
For native uses of North Dakota plants, see the North Dakota Ethnobotany Database.
Flowering plant families are given in accordance with the last verstion of Systema Angiospermarum classification. All ferns listed under "Polypodiaceae".