Plant Communities: Northern Coastal Scrub Redwood Forest Mixed Evergreen Forest Chaparral Yellow Pine Forest Foothill Woodland
Synonyms: Trillium chloropetalum var. giganteum Trillium sessile
Counties: Alameda Amador Butte Calaveras Contra Costa Colusa El Dorado Fresno Glenn Humboldt Lake Madera Marin Mendocino Monterey Napa Nevada Placer Santa Barbara San Benito Santa Clara Santa Cruz San Mateo Shasta Siskiyou Sonoma Tehama Trinity Tuolumne Yuba