Umbilicaria americana
PNW
AK
BC
ID
MT
OR
WA
31 specimens from 9 herbaria:
Alaska (3)
British Columbia (1)
Idaho (5)
Montana (2)
Oregon (3)
Washington (17)
11 images from 4 herbaria:
OSC (5)
RR (3)
SRP-L (2)
WTU (1)