Counties:
Alameda
Alpine
Butte
Calaveras
Contra Costa
Colusa
Del Norte
El Dorado
Fresno
Glenn
Humboldt
Lake
Lassen
Los Angeles
Madera
Mendocino
Mono
Monterey
Modoc
Mariposa
Marin
Napa
Nevada
Placer
Plumas
Santa Clara
Shasta
Sierra
Siskiyou
Sonoma
Tehama
Trinity
Tulare
Tuolumne
Yuba

Jepson Bioregions:
Warner Mountains
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
Modoc Plateau
Sierra Nevada East