Placynthium nigrum
PNW
AK
BC
ID
MT
OR
WA
YK
63 specimens from 5 herbaria:
Alaska (44)
British Columbia (6)
Idaho (2)
Montana (6)
Oregon (2)
Washington (1)
Yukon Territory (2)
54 images from 3 herbaria:
ALA (39)
RR (14)
SRP (1)