Letharia columbiana
PNW
BC
ID
MT
OR
WA
1213 specimens from 13 herbaria:
British Columbia (34)
Idaho (104)
Montana (139)
Oregon (779)
Washington (156)
1132 images from 7 herbaria:
BBLM (1)
CRMO (6)
OSC (1107)
RR (12)
SRP (1)
SRP-L (2)
WTU (3)