Abstract

Three families of the Russian moss flora are described and illustrated. Leptodontaceae includes Leptodon snithii and 5 species of Forsstroemia (F. japonica, F. cryphaeoides, F. stricta, F. trichomitra and F. noguchi). F. stricta Lazarenko is considered as an endemic of Russian Far East; this species is very close to pan-subtropical F. producta. Endotome segments are found in F. japonica. Cryphaeaceae includes 2 species of Cryphaea, both known in Russia by the single collection - C. heteromalla is known from Northern Caucasus, C. amurensis Ignatov sp. nov. is described from Khabarovsk Territory, Far East. Leucodontaceae includes Dozya japonica, Antitrichia curtipendula and 5 species of Leucodon (L. sciuroides, L. immersus, L. coreense, L. pendulus and L. flagellare). Sporophytes of L. flagellare are described for the first time.