Ambrosia chamissonis
PNW
AK
BC
OR
WA
292 specimens from 20 herbaria:
Alaska (1)
British Columbia (60)
Oregon (97)
Washington (134)
112 images from 17 herbaria:
BABY (1)
HPSU (1)
ID (6)
LEA (1)
MONT (2)
OSC (45)
PLU (6)
PSM (7)
REED (3)
SAJH (1)
SOC (3)
SRP (4)
UBC (5)
WCW (3)
WS (1)
WTU (14)
WWB (9)