Counties:
Alameda
Butte
Calaveras
Contra Costa
Colusa
El Dorado
Fresno
Glenn
Kern
Lake
Los Angeles
Madera
Mendocino
Merced
Monterey
Mariposa
Marin
Napa
Placer
Sacramento
Santa Barbara
San Benito
Santa Clara
Santa Cruz
Siskiyou
San Luis Obispo
Solano
Sonoma
Stanislaus
Sutter
Tehama
Trinity
Tulare
Tuolumne
Ventura
Yolo

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