Mentha arvensis
PNW
AK
BC
ID
MT
OR
WA
YK
108 specimens from 12 herbaria:
Alaska (46)
British Columbia (14)
Idaho (11)
Montana (7)
Oregon (6)
Washington (14)
Yukon Territory (10)
25 images from 8 herbaria:
BABY (3)
EWU (1)
ID (5)
IDS (2)
MONT (4)
REED (2)
UAAH (5)
UBC (3)