Ambrosia
psilostachya
PNW
BC
ID
MT
OR
WA
81 specimens from 12 herbaria:
British Columbia (1)
Idaho (22)
Montana (29)
Oregon (20)
Washington (9)
59 images from 11 herbaria:
ID (5)
IDE (7)
IDS (4)
LEA (1)
MONT (14)
MONTU (11)
OSC (9)
SRP (3)
UAAH (1)
UBC (1)
WTU (3)