Calflora, a 501c3 non-profit
Distribution by County   2647    
Delphinium hesperium  A. Gray
Foothill larkspur,   Western larkspur
Delphinium hesperium is a perennial herb that is native to California, and endemic (limited) to California.
Record Count by County

Alameda: 48 Los Angeles: 1 San Benito: 253 Stanislaus: 13
Butte: 25 Madera: 1 San Diego: 74 Sutter: 6
Calaveras: 3 Marin: 70 San Joaquin: 1 Tehama: 19
Colusa: 37 Mariposa: 4 San Luis Obispo: 4 Trinity: 4
Contra Costa: 44 Mendocino: 22 San Mateo: 37 Tulare: 7
El Dorado: 1 Merced: 10 Santa Clara: 53 Tuolumne: 2
Fresno: 63 Monterey: 5 Santa Cruz: 5 Ventura: 1
Glenn: 10 Napa: 53 Shasta: 3 Yolo: 6
Humboldt: 7 Placer: 3 Sierra: 1 Yuba: 1
Kern: 12 Riverside: 6 Solano: 14
Lake: 45 Sacramento: 4 Sonoma: 32

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]. 2026. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 01/13/2026).