Perennials, 15–60 cm (taproots slender, caudices swollen). Stems 1–3, slender or stout, branched proximally (sparingly) or distally, glabrate to tomentulose. Leaves basal and cauline; petiolate (petioles relatively broadly winged); blades elliptic or oblanceolate, often runcinate, 7–28 × 0.5–7 cm, margins pinnately lobed to dentate (lobes remote, lanceolate to narrowly triangular, often recurved), apices attenuate, faces usually tomentulose to glabrate, sometimes glandular. Heads 7–10(–30), in corymbiform arrays. Calyculi of 5–6, deltate to lanceolate, tomentulose bractlets 1.5–4 mm. Involucres cylindro-campanulate, 8–16 × 3–5 mm. Phyllaries 5(–10), (deep green or black) lanceolate, 10–16 mm, (bases becoming strongly keeled and swollen, often glabrous, margins yellowish, conspicuously and densely tomentulose), apices acute to strongly acuminate, abaxial faces densely tomentulose adaxial with fine hairs. Florets 5–10(–12); corollas yellow, 15–20 mm. Cypselae deep reddish brown, subcylindric, 5–8 mm, apices constricted, ribs 10 (prominent); pappi yellowish white, 6–12 mm (bristles unequal). 2n = 22, 33, 44, 55, 77, 88.
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