Ambrosia artemisiifolia
PNW
BC
ID
MT
OR
WA
227 specimens from 21 herbaria:
British Columbia (19)
Idaho (56)
Montana (50)
Oregon (69)
Washington (33)
121 images from 16 herbaria:
BBLM (1)
CIC (7)
HPSU (5)
ID (21)
IDE (11)
IDS (7)
MONT (23)
MONTU (16)
SOC (3)
SRP (5)
UBC (1)
VALE (1)
WCW (1)
WSTC (1)
WTU (16)
WWB (2)