Calliergon cordifolium
PNW
AK
BC
ID
MT
OR
WA
268 specimens from 10 herbaria:
Alaska (85)
British Columbia (53)
Idaho (24)
Montana (29)
Oregon (16)
Washington (56)
6 images from 3 herbaria:
SRP-B (1)
UAAH (2)
WTU (3)