Ambrosia psilostachya
PNW
BC
ID
MT
OR
WA
113 specimens from 14 herbaria:
British Columbia (1)
Idaho (23)
Montana (61)
Oregon (20)
Washington (8)
75 images from 12 herbaria:
ID (5)
IDE (7)
IDS (5)
LEA (1)
MONT (14)
MONTU (11)
RM (2)
SRP (3)
UAAH (1)
UBC (1)
USFS (23)
WTU (2)