Plant Communities: Yellow Pine Forest Red Fir Forest Lodgepole Forest Foothill Woodland Chaparral Valley Grassland
Synonyms: Asclepias eriocarpa var. microcarpa Asclepias fremontii
Counties: Butte Colusa El Dorado Fresno Glenn Humboldt Kern Lake Los Angeles Madera Mariposa Mendocino Merced Monterey Napa Nevada Orange Placer Plumas Riverside Sacramento Santa Barbara San Bernardino San Benito San Diego San Luis Obispo Shasta Solano Sutter Tehama Trinity Tulare Ventura Yolo Yuba