Calliergon cordifolium
PNW
AK
BC
ID
MT
OR
WA
YK
289 specimens from 10 herbaria:
Alaska (125)
British Columbia (54)
Idaho (8)
Montana (32)
Oregon (11)
Washington (54)
Yukon Territory (5)
12 images from 3 herbaria:
ALA (8)
UAAH (2)
WTU (2)