Usnea longissima
PNW
AK
BC
OR
WA
330 specimens from 9 herbaria:
Alaska (43)
British Columbia (92)
Oregon (88)
Washington (107)
139 images from 6 herbaria:
ALA (10)
OSC (109)
RR (8)
SRP (7)
SRP-L (3)
WTU (2)