Calflora, a 501c3 non-profit
Distribution by County   2326    
Conyza coulteri  A. Gray

(not an active name)
Coulter's conyza,   Coulter's horseweed
Conyza coulteri is an annual herb that is native to California, and also found elsewhere in western North America.
also called Laennecia coulteri
Record Count by County

Alameda: 4 Kern: 23 Sacramento: 1 Santa Cruz: 3
Amador: 3 Kings: 2 San Benito: 2 Sonoma: 1
Butte: 2 Los Angeles: 31 San Bernardino: 32 Stanislaus: 6
Colusa: 3 Merced: 4 San Diego: 84 Tulare: 3
Fresno: 3 Mono: 1 San Joaquin: 4 Ventura: 35
Glenn: 2 Monterey: 5 San Luis Obispo: 14
Imperial: 6 Orange: 68 Santa Barbara: 35
Inyo: 8 Riverside: 39 Santa Clara: 2

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: 05/05/2024).