Calflora, a 501c3 non-profit
Distribution by County   117    
Ageratina adenophora  (Spreng.) R. M. King & H. Rob.
Sticky snakeroot,   Thoroughwort
Ageratina adenophora is a perennial herb that is not native to California.
Cal-IPC rating: moderate
Record Count by County

Alameda: 31 Mendocino: 1 San Diego: 26 Santa Clara: 5
Contra Costa: 18 Monterey: 76 San Francisco: 17 Santa Cruz: 105
Kern: 1 Orange: 202 San Luis Obispo: 31 Ventura: 7
Los Angeles: 967 Riverside: 6 San Mateo: 3 Yolo: 1
Marin: 4735 San Bernardino: 18 Santa Barbara: 130

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: 12/03/2024).