Usnea
lapponica
PNW
AK
BC
ID
MT
OR
WA
YK
770 specimens from 10 herbaria:
Alaska (35)
British Columbia (57)
Idaho (235)
Montana (197)
Oregon (118)
Washington (126)
Yukon Territory (1)
668 images from 5 herbaria:
ALA (15)
OSC (645)
RR (4)
SRP (3)
WTU (1)