Calflora, a 501c3 non-profit
Distribution by County   6990    
Quercus douglasii  Hook. & Arn.
Blue oak
Quercus douglasii is a tree that is native to California, and endemic (limited) to California.
Record Count by County

Alameda: 84 Lake: 45 Sacramento: 139 Stanislaus: 63
Amador: 57 Los Angeles: 43 San Benito: 1120 Sutter: 24
Butte: 226 Madera: 144 San Joaquin: 22 Tehama: 269
Calaveras: 119 Marin: 39 San Luis Obispo: 461 Trinity: 9
Colusa: 40 Mariposa: 123 San Mateo: 50 Tulare: 320
Contra Costa: 165 Mendocino: 40 Santa Barbara: 134 Tuolumne: 221
El Dorado: 98 Merced: 60 Santa Clara: 112 Ventura: 8
Fresno: 1251 Monterey: 420 Shasta: 91 Yolo: 10
Glenn: 13 Napa: 124 Sierra: 1 Yuba: 144
Kern: 497 Nevada: 77 Solano: 28
Kings: 44 Placer: 86 Sonoma: 78

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).