Vallisneria americana
PNW
BC
MT
OR
WA
53 specimens from 12 herbaria:
British Columbia (6)
Montana (1)
Oregon (20)
Washington (26)
36 images from 9 herbaria:
EWU (1)
HPSU (11)
IDS (1)
MONTU (1)
NOCA (4)
PLU (1)
SRP (1)
WTU (12)
WWB (4)