Counties:
Alameda
Amador
Butte
Calaveras
Contra Costa
Colusa
El Dorado
Fresno
Inyo
Kings
Kern
Los Angeles
Madera
Merced
Monterey
Mariposa
Napa
Nevada
Orange
Riverside
Sacramento
Santa Barbara
San Bernardino
San Benito
Santa Clara
Santa Cruz
San Diego
Shasta
Siskiyou
San Joaquin
San Luis Obispo
Solano
Sonoma
Stanislaus
Sutter
Tehama
Tulare
Ventura
Yolo

Jepson Bioregions:
Desert Mountains
Cascade Range Foothills
Sierra Nevada Foothills
Sacramento Valley
San Joaquin
South Coast
Channel Islands
Transverse Ranges
Peninsular Ranges
Mojave Desert