Related species: Penstemon azureus var. angustissimus Penstemon azureus var. azureus
Plant Communities: Chaparral Yellow Pine Forest Sagebrush Scrub Foothill Woodland
Counties: Alpine Amador Butte Calaveras Colusa Del Norte El Dorado Fresno Glenn Humboldt Lake Madera Mariposa Mendocino Nevada Placer Sacramento Shasta Siskiyou Tehama Trinity Tulare Tuolumne