Betula nana
PNW
AK
BC
ID
MT
WA
130 specimens from 14 herbaria:
Alaska (89)
British Columbia (7)
Idaho (2)
Montana (24)
Washington (2)
73 images from 12 herbaria:
BABY (2)
ID (8)
IDS (1)
MONTU (22)
PSM (1)
SRP (1)
UAAH (30)
UBC (1)
WCW (1)
WS (1)
WTU (3)
WWB (2)