Psora
nipponica
PNW
AK
BC
ID
MT
OR
WA
YK
88 specimens from 10 herbaria:
Alaska (3)
British Columbia (14)
Idaho (17)
Montana (6)
Oregon (25)
Washington (22)
Yukon Territory (1)
34 images from 7 herbaria:
ALA (1)
BBLM (1)
CRMO (2)
OSC (9)
RR (14)
SRP (4)
SRP-L (3)