Cirsium

Cirsium arvense

California thistle

Cirsium vulgare

Black thistle

Cirsium palustre

Marsh thistle

Cirsium oleraceum

Cabbage thistle

Cirsium heterophyllum

Melancholy thistle

Cirsium vulgare subsp. vulgare

Cirsium eriophorum

Woolly thistle

Cirsium dissectum

Meadow thistle

Cirsium spinosissimum

Alpen-kratzdistel

Cirsium rivulare

Brook thistle

Cirsium tuberosum

Tuberous thistle

Cirsium monspessulanum

Cirsium horridulum

Horrid thistle

Cirsium erisithales

Yellow thistle

Cirsium occidentale

Cirsium acaule

Cirsium undulatum

Pasture thistle

Cirsium discolor

Field thistle

Cirsium nipponicum

Cirsium japonicum

Japanese thistle