Plants (1–)5–30(–60) cm; taproots seldom branched. Stems 1–15+, ascending to erect, pinkish to reddish, (± equaling foliage), glabrous or sparsely villous, usually more densely so distally. Leaves 20+, horizontal to erect; petioles ± slightly winged distally; blades obovate to oblanceolate (runcinate), 5–25 × 1–4 cm, bases attenuate, margins lacerate, lobes retrorse, triangular to nearly lanceolate, acute to long-acuminate, terminals about as large as distal laterals, teeth usually few, rarely 0, irregular, straight to retrorse, minute to pronounced or secondary lobules, apices usually acute or acuminate, sometimes obtuse, rarely rounded, faces glabrous or glabrate to sparsely villosulous (mainly midveins). Calyculi of 16–18, reflexed to recurved, sometimes glaucous or purplish, lanceolate bractlets in 2 series, 3.8–10 × 1–2 mm, margins white to purplish, narrowly scarious, apices acute or long-acuminate, erose, hornless. Involucres green, tips reddish gray, urceolate (closed) to cylindro-campanulate (open), 10–25 mm. Phyllaries 18–19 in 2 series, lanceolate-linear, 1.2–2.1 mm wide, margins scarious, slightly revolute at green edge, apices long-acuminate, erose-scarious, usually at least some horned. Florets ca. 70–75+; corollas sulphur yellow, outer with abaxial purplish or grayish stripe, 12–16 × 1–1.5 mm. Cypselae brick red to reddish brown or reddish purple, bodies oblanceoloid to obovoid, (2.2–)2.5–3(–4) mm, cones terete, 0.8–1.3 mm, beaks slender, (5–)7–8.5 mm, ribs ca. 15, sharp, faces proximally ± tuberculate (sometimes barely so) to conspicuously muricate in distal 1/2; pappi white to sordid, 4–7 mm. 2n = 16, 24, 32 (Europe).
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A herb. It keeps growing from year to year. It grows 35 cm tall. The leaves are in rings. They are oblong and 5-25 cm long by 1-4 cm wide. There are teeth along the edge.
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