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063  Cirsium vulgare (Savi) Ten.


Nome comune: Cardo asinino

Cirsium vulgare (Spear thistle, Bull thistle, Plumed thistle, Scotch thistle, Roadside thistle; syn. C. lanceolatum) is a species of the genus Cirsium, native throughout Europe, Asia and northern Africa, but also present in North America and Australia as an invasive weed. It is designated an "injurious weed" under the UK Weeds Act 1959[1] and a noxious weed in Australia[2] and in nine US states.[3] Cirsium vulgare, Wagga Wagga, NSW, AustraliaIt is a tall biennial thistle, forming a rosette of leaves in the first year, and a flowering stem 12.5 m tall in the second year. The leaves are very spiny, deeply lobed, up to 1525 cm long (smaller on the upper part of the flower stem). The inflorescence is 2.55 cm diameter, pink-purple, with all the florets of similar form (no division into disc and ray florets). The seeds are 5 mm long, with a downy pappus, which assists in wind dispersal.