Counties:
Amador
Butte
Colusa
El Dorado
Fresno
Glenn
Kern
Lake
Lassen
Los Angeles
Madera
Mendocino
Merced
Mono
Monterey
Modoc
Mariposa
Nevada
Orange
Placer
Plumas
Sacramento
Santa Barbara
San Bernardino
San Benito
San Diego
Shasta
Sierra
Siskiyou
San Luis Obispo
San Mateo
Sonoma
Tehama
Trinity
Tulare
Ventura

Jepson Bioregions:
White and Inyo Mountains
North Coast
Klamath Ranges
North Coast Ranges
Cascade Range Foothills
High Cascade Range
Sierra Nevada Foothills
High Sierra Nevada
Tehachapi Mtns
Central Coast
SF Bay
South Coast Ranges
South Coast
Transverse Ranges
Peninsular Ranges
Sierra Nevada East