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Scotch Thistle | South Dakota Department of Agriculture

Scotch Thistle

(Onopordum acanthium)

Stems: erect, simple to usually much-branched above, with broad and spiny wings formed by leaf bases

Leaves: alternate, blades simple, coarsely lobed or toothed with spines

Flowers: purple to violet or reddish to pinkish-white disk florets

Origin: Eurasia