Calflora, a 501c3 non-profit
Distribution by County   119    
Ageratina occidentalis  (Hook.) R. M. King & H. Rob.
Western eupatorium,   Western joepiweed,   Western snakeroot
Ageratina occidentalis is a perennial herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Alpine: 21 Humboldt: 11 Mendocino: 2 Shasta: 28
Butte: 8 Inyo: 44 Modoc: 7 Sierra: 15
Colusa: 4 Kern: 3 Mono: 68 Siskiyou: 15
Del Norte: 2 Lassen: 18 Nevada: 43 Tehama: 12
El Dorado: 32 Madera: 5 Placer: 25 Trinity: 34
Fresno: 50 Marin: 1 Plumas: 39 Tulare: 64
Glenn: 1 Mariposa: 14 San Bernardino: 1 Tuolumne: 15

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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 11/21/2024).