Verrucaria margacea
PNW
AK
BC
MT
OR
WA
16 specimens from 5 herbaria:
Alaska (1)
British Columbia (2)
Montana (1)
Oregon (2)
Washington (10)
5 images from 4 herbaria:
OSC (1)
SRP-L (1)
WTU (1)
WWB (2)