cascara buckthorn
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Rosales
- family: Rhamnaceae
- genus: Frangula
- species: Frangula purshiana
Ladner
Pitt Meadows
Port Alberni
Salmo
British Columbia
Canada
Bergshamra
Djursholm
Stockholm
Sweden
Lewiston
Idaho
Belfair
Marysville
Olympia
Seabeck
Seattle
Smokey Point
Spokane
Tacoma
Washington
Washington, D. C.
Washington, D.C.
United States