Letharia columbiana
PNW
BC
ID
MT
OR
WA
461 specimens from 10 herbaria:
British Columbia (33)
Idaho (94)
Montana (99)
Oregon (165)
Washington (70)
384 images from 7 herbaria:
RR (12)
CRMO (6)
SRP (1)
OSC (362)
BBLM (1)
WTU (1)
ALA (1)