Ambrosia artemisiifolia
PNW
BC
ID
MT
OR
WA
235 specimens from 18 herbaria:
British Columbia (20)
Idaho (59)
Montana (42)
Oregon (75)
Washington (39)
173 images from 16 herbaria:
BBLM (1)
CIC (8)
HPSU (9)
ID (27)
IDE (11)
IDS (7)
MONT (25)
MONTU (16)
OSC (37)
SOC (3)
SRP (5)
UBC (1)
VALE (1)
WCW (1)
WTU (19)
WWB (2)