Berberis vulgaris
PNW
BC
ID
MT
OR
WA
54 specimens from 12 herbaria:
British Columbia (18)
Idaho (15)
Montana (6)
Oregon (1)
Washington (14)
31 images from 10 herbaria:
EWU (3)
ID (7)
IDE (5)
IDS (2)
MONTU (5)
OSC (1)
SRP (3)
UBC (3)
WS (1)
WTU (1)