Western ragweed
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Asterales
- family: Asteraceae
- genus: Ambrosia
- species: Ambrosia psilostachya
Wolfville
Nova Scotia
Deep River
Ontario
Canada
Mannheim
Baden-Württemberg
Woltersdorf
Brandenburg
Ludwigshafen am Rhein
Rheinland-Pfalz
Germany
Bridel
03
Luxembourg
Oegstgeest
South Holland
Netherlands
Sopot
Pomerania
Poland
Kalmar
Kalmar
Sweden
Lytham St Annes
England
United Kingdom
Prattville
Alabama
Oquawka
Illinois
Belle Plaine
Elwood
Emporia
Kansas
Barataria
Jean Lafitte
Louisiana
Ontario
Redmond
Roseburg
White City
Oregon
Kettle Falls
Walla Walla
Washington
United States
Arendonk
Chihuahua