Rose Thistle

Cirsium andersonii

Arizona Thistle

Cirsium arizonicum

Arizona Thistle

Cirsium arizonicum var. arizonicum

Peregrine Thistle

Cirsium cymosum

Peregrine Thistle

Cirsium cymosum var. cymosum

Douglas' Thistle

Cirsium douglasii

Douglas' Thistle

Cirsium douglasii var. breweri

Cirsium inamoenum

Mojave Thistle

Cirsium mohavense

Cobweb Thistle

Cirsium occidentale

California Thistle

Cirsium occidentale var. californicum

Snowy Thistle

Cirsium occidentale var. candidissimum

Venus Thistle

Cirsium occidentale var. venustum

Meadow Thistle

Cirsium scariosum

Dinnerplate Thistle

Cirsium scariosum var. americanum

Rosette Thistle

Cirsium scariosum var. congdonii

Wavyleaf Thistle

Cirsium undulatum