California buckthorn
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Rosales
- family: Rhamnaceae
- genus: Frangula
- species: Frangula californica
Camp Verde
Arizona- Altadena
- Auburn
- Belvedere
- Capitola
- Challenge-Brownsville
- Chatsworth
- Claremont
- Colma
- Covelo
- Daly City
- Felton
- Fort Bragg
- Georgetown
- Grass Valley
- Guerneville
- Highlands-Baywood Park
- Idyllwild
- Idyllwild-Pine Cove
- Inverness
- Ladera
- Lagunitas-Forest Knolls
- Laytonville
- Lexington Hills
- Live Oak
- Lower Lake
- Marin City
- Mission Canyon
- Monte Sereno
- Monterey
- Mount Hermon
- Mount Shasta
- Nice
- Opal Cliffs
- Pacific Grove
- Pasadena
- Penn Valley
- Redding
- Sacramento
- San Diego
- San Francisco
- Santa Barbara
- Santa Monica
- Sausalito
- Seaside
- Shingle Springs
- Soquel
- South El Monte
- South Pasadena
- Sutter
- Tiburon
- Truckee
- Ukiah
- West Menlo Park
- Willow Creek
California- Florence
Colorado- Fruitdale
- Grants Pass
Oregon- Washington, D. C.
Washington, D.C.
United States