Betula occidentalis
PNW
AK
BC
ID
MT
OR
WA
935 specimens from 34 herbaria:
Alaska (7)
British Columbia (88)
Idaho (316)
Montana (156)
Oregon (147)
Washington (212)
539 images from 31 herbaria:
BABY (8)
BBLM (1)
BOIS (11)
CIC (7)
CIC-PYNF (1)
COCC (1)
CRMO (3)
DPP (1)
EWU (15)
HPSU (6)
ID (132)
IDE (2)
IDS (53)
IFBLM (1)
LEA (1)
MONT (60)
MONTU (69)
NEZ (1)
NOCA (5)
OSC (55)
PSM (5)
REED (2)
SBLM (1)
SOC (3)
SRP (49)
UBC (8)
VALE (6)
WCW (6)
WS (4)
WTU (14)
WWB (8)