Vallisneria americana
PNW
BC
ID
MT
OR
WA
69 specimens from 13 herbaria:
British Columbia (6)
Idaho (1)
Montana (10)
Oregon (22)
Washington (30)
51 images from 12 herbaria:
EWU (1)
HPSU (12)
ID (1)
IDS (1)
MONTU (4)
NOCA (4)
OSC (2)
PLU (1)
SRP (1)
WS (1)
WTU (19)
WWB (4)