Betula papyrifera
PNW
AK
BC
ID
MT
OR
WA
509 specimens from 26 herbaria:
Alaska (23)
British Columbia (150)
Idaho (102)
Montana (75)
Oregon (24)
Washington (131)
254 images from 24 herbaria:
BABY (2)
BLMVL (1)
CIC-PYNF (1)
COCC (2)
EWU (8)
HPSU (1)
ID (62)
IDS (4)
LEA (2)
MONT (26)
MONTU (28)
NOCA (12)
OSC (7)
PLU (3)
PSM (6)
REED (1)
SRP (17)
UAAH (7)
UBC (9)
UWB (3)
WCW (7)
WS (2)
WTU (30)
WWB (13)