Counties:
Alameda
Amador
Butte
Calaveras
Contra Costa
Del Norte
El Dorado
Fresno
Humboldt
Kern
Lake
Los Angeles
Madera
Mendocino
Monterey
Modoc
Mariposa
Marin
Napa
Nevada
Orange
Riverside
Sacramento
Santa Barbara
San Bernardino
San Benito
Santa Clara
Santa Cruz
San Diego
Sierra
San Luis Obispo
Solano
Sonoma
Stanislaus
Sutter
Tehama
Trinity
Tulare
Tuolumne
Ventura

Jepson Bioregions:
North Coast Ranges
Cascade Range Foothills
High Cascade Range
Sierra Nevada Foothills
High Sierra Nevada
Tehachapi Mtns
Sacramento Valley
San Joaquin
Central Coast
SF Bay
South Coast Ranges
South Coast
Channel Islands
Transverse Ranges
Peninsular Ranges