Betula
nana
ssp.
exilis
PNW
AK
BC
YK
193 specimens from 8 herbaria:
Alaska (183)
British Columbia (2)
Yukon Territory (8)
164 images from 6 herbaria:
ALA (142)
BABY (2)
ID (4)
UAAH (12)
UBC (2)
WWB (2)
