# Observations on Betula sp. in Arctic. White Sea, 2002
LOC	Locality (1-4 deep mainland, 5-8 sea coast, 9-11 island)
LEAF.L	Leaf length, mm (from this point, everything is about maximal leaf on the choosen branch)
LEAF.W	Leaf width, mm
LEAF.MAXW	Location of maximal leaf width (from leaf base), mm
PUB	Pubescence (1 if present)
PAPILLAE	Papillae on stem (1 if present)
CATKIN	Length of about-to-ripe female catkin, mm
SCALE.L	Length of female flower scale, mm
LOBES	Position of female flower bract lobes (0 sideways, 1 upwards)
WINGS	Wings of the fruit (0 wider than seed, 1 equal or less than seed)