Betula pendula
PNW
BC
ID
MT
OR
WA
101 specimens from 15 herbaria:
British Columbia (20)
Idaho (8)
Montana (1)
Oregon (33)
Washington (39)
45 images from 12 herbaria:
HPSU (6)
ID (3)
IDE (1)
IDS (1)
MONTU (1)
OSC (13)
PLU (1)
SOC (2)
SRP (4)
UBC (4)
WS (1)
WTU (8)