Populus nigra
PNW
BC
ID
OR
WA
43 specimens from 11 herbaria:
British Columbia (15)
Idaho (5)
Oregon (11)
Washington (12)
21 images from 9 herbaria:
ID (2)
OSC (1)
PSM (1)
SOC (1)
SRP (5)
UBC (2)
WS (3)
WTU (5)
WWB (1)