Trifolium arvense
PNW
BC
ID
MT
OR
WA
258 specimens from 24 herbaria:
British Columbia (19)
Idaho (53)
Montana (8)
Oregon (84)
Washington (94)
167 images from 22 herbaria:
BOIS (1)
CIC (2)
COCC (2)
EWU (1)
HPSU (12)
ID (20)
IDE (15)
IDS (2)
MONT (4)
MONTU (4)
MORA (1)
NEZ (2)
NOCA (6)
OSC (36)
PLU (8)
PSM (2)
SOC (3)
SRP (9)
UBC (3)
WCW (4)
WS (9)
WTU (21)