Calflora, a 501c3 non-profit
Distribution by County   1694    
Castilleja exserta  (A. Heller) T. I. Chuang & Heckard
Owl's clover,   Purple owl's clover
Castilleja exserta is an annual herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Alameda: 58 Kings: 5 Plumas: 2 Shasta: 1
Amador: 6 Lake: 21 Riverside: 204 Solano: 34
Butte: 74 Los Angeles: 292 Sacramento: 10 Sonoma: 15
Calaveras: 3 Madera: 20 San Benito: 236 Stanislaus: 36
Colusa: 39 Marin: 32 San Bernardino: 115 Sutter: 7
Contra Costa: 174 Mariposa: 16 San Diego: 414 Tehama: 12
El Dorado: 6 Mendocino: 36 San Francisco: 6 Trinity: 1
Fresno: 104 Merced: 44 San Joaquin: 10 Tulare: 66
Glenn: 10 Monterey: 215 San Luis Obispo: 547 Tuolumne: 6
Humboldt: 52 Napa: 26 San Mateo: 96 Ventura: 99
Imperial: 1 Nevada: 1 Santa Barbara: 259 Yolo: 13
Inyo: 7 Orange: 225 Santa Clara: 161
Kern: 327 Placer: 7 Santa Cruz: 63

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).