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DescriptionErect annual or biennial herb, to 2.5 m with a leafy stem. Leaves sessile, runcinate-pinnate (in ours - f. serriola) or unlobed (f. integrifolia), the lamina often held in a vertical plane. Inflorescence a panicle; flowers small (involucre 6-8 mm long), yellow. Achene 3 mm, with a long beak equalling or exceeding the achene in length.