Betula pumila
PNW
AK
BC
ID
MT
OR
WA
YK
137 specimens from 14 herbaria:
Alaska (1)
British Columbia (47)
Idaho (29)
Montana (14)
Oregon (17)
Washington (26)
Yukon Territory (3)
51 images from 10 herbaria:
ALA (1)
BABY (1)
CIC (2)
HPSU (1)
ID (21)
IDS (4)
MONTU (10)
PLU (1)
UBC (7)
WTU (3)