Data provided by the participants of the Consortium of California Herbaria

View additional distribution information on the Jepson eflora

California thistle (Cirsium occidentale var. californicum), also known as cobweb thistle, is a biennial native to much of California and the western United States. In its first year, it forms a rosette of gray-green spiny leaves. In its second year, it sends up multibranched stems topped with clusters of lavender-pink to maroon-red flowers. The bracts are covered in distinctive cobwebby hairs, giving the plant its common name.

This variety is not invasive or weedy like some non-native thistles and is a great choice for wildlife gardens. It’s drought tolerant and does not require summer water once established. California thistle is a valuable nectar source, attracting native bees, bumble bees, and butterflies. It can be grown easily from seed without any special treatment.


Plant type

Perennial herb

Calscape icon
Color

Purple, Pink

Water

Very Low, Low

Plant communities

Chaparral, Coastal Sage Scrub, Foothill Woodland, Southern Oak Woodland, Yellow Pine Forest

Caterpillars
Butterflies

Butterflies and moths supported

0 confirmed and 14 likely

Confirmed Likely

Garden Webworm Moth

Achyra rantalis

Orange Tortrix Moth

Argyrotaenia franciscana

Sunflower Moth

Homoeosoma electella

Bilobed Looper Moth

Megalographa biloba