California Thistle Cirsium occidentale var californicum is a Perennial herb native to the Santa Monica Mountains and endemic to California (i.e. found nowhere else). The plant can grow …

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Creeping thistle is a herbaceous perennial plant growing up to 150 cm, forming extensive clonal colonies from thickened roots that send up numerous erect shoots during the growing season. …

Californian thistle (Cirsium arvense) is a common perennial thistle with an underground creeping root system.

Common names: artichoke thistle; cardoon; wild artichoke. Cynara cardunculus (artichoke thistle) is a large perennial thistle (family Asteraceae) from the Mediterranean region found below 500 …

Cirsium occidentale var. compactum — compact cobwebby thistle; a short, clumpy plant endemic to California, which grows only along the coast of the San Francisco Bay Area and the Central …

Common name: California thistle Family: Asteraceae (Sunflower) Habitat: Disturbed places and on dry slopes and fans below 7000' in coastal sage scrub, chaparral and southern oak …

But did you know that California is also home to 19 species of beautiful native thistles, 7 of which are endemic to our state? They may be spiky and sharp, but they are an integral part of many …

California Thistle (Cirsium occidentale var. californicum) Aliases: Bigelow Thistle, Cobwebby Thistle Family: Sunflower If your expedition is seeking California Thistle, you can leave the …

Information on California Thistle on the Tasmanian Department of Primary Industries, Parks, Water and Environment's website (external link).