Potamogeton illinoensis
PNW
BC
ID
MT
OR
WA
186 specimens from 19 herbaria:
British Columbia (50)
Idaho (10)
Montana (30)
Oregon (39)
Washington (57)
70 images from 15 herbaria:
BABY (1)
BBLM-OWY (2)
BLMVL (2)
CIC (12)
EWU (2)
HPSU (1)
ID (3)
MONT (3)
MONTU (23)
NOCA (2)
OSC (1)
PSM (2)
SRP (1)
WCW (2)
WTU (13)