Myriophyllum verticillatum
PNW
AK
BC
ID
MT
OR
WA
YK
242 specimens from 21 herbaria:
Alaska (35)
British Columbia (115)
Idaho (6)
Montana (24)
Oregon (20)
Washington (36)
Yukon Territory (6)
65 images from 18 herbaria:
ALA (2)
BABY (2)
CIC (2)
EWU (1)
HPSU (1)
ID (2)
IDE (4)
IDS (1)
MONT (1)
MONTU (14)
RM (2)
SOC (2)
SRP (2)
UAAH (4)
UBC (3)
USFS (1)
WTU (18)
WWB (3)