Calflora, a 501c3 non-profit
Distribution by County   2411    
Crataegus columbiana  Howell

(not an active name)
Columbia hawthorn
Crataegus columbiana is a tree or shrub that is native to California.
also called Crataegus douglasii
Record Count by County

Alpine: 4 Lassen: 2 San Mateo: 3 Sonoma: 26
Contra Costa: 1 Mendocino: 1 Santa Clara: 1 Tehama: 1
Humboldt: 4 Modoc: 16 Shasta: 15 Trinity: 8
Kern: 1 Plumas: 4 Siskiyou: 5

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/10/2025).