Counties:
Alameda
Amador
Butte
Calaveras
Contra Costa
Colusa
El Dorado
Fresno
Glenn
Humboldt
Imperial
Inyo
Kern
Los Angeles
Madera
Mendocino
Merced
Mono
Monterey
Modoc
Mariposa
Marin
Napa
Nevada
Orange
Placer
Plumas
Riverside
Sacramento
Santa Barbara
San Bernardino
San Benito
Santa Clara
Santa Cruz
San Diego
San Francisco
Shasta
Sierra
Siskiyou
San Joaquin
San Luis Obispo
San Mateo
Solano
Sonoma
Stanislaus
Sutter
Tehama
Tulare
Tuolumne
Ventura
Yolo
Yuba

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