Acorus americanus
PNW
AK
BC
ID
MT
WA
34 specimens from 10 herbaria:
Alaska (2)
British Columbia (15)
Idaho (8)
Montana (8)
Washington (1)
22 images from 6 herbaria:
ALA (2)
CIC (1)
ID (4)
MONT (1)
MONTU (6)
UBC (8)