Perennials, 100–200(–300) cm (rhizomatous, producing tubers). Stems (often reddish, leafy) erect, ± strigose proximally, strigose or glabrous distally. Leaves cauline; opposite (proximal) or alternate; petioles 0–1 cm; blades (light to dark green, 3-nerved distal to bases) lanceolate to lance-linear, 6–18 × 1–2 cm, bases cuneate, margins entire or subentire (revolute), faces hirsute to tomentose and gland-dotted (abaxial) or scabrous (adaxial). Heads 3–6 . Peduncles 1.5–8 cm (not gland-dotted). Involucres hemispheric, 9–10(–16) mm diam. Phyllaries 16–20 (reflexed or loose), lanceolate or lance-ovate, 5–7 × 1.5–2.3 mm, apices acute to acuminate, abaxial faces hirsute (proximally) to glabrate, gland-dotted. Paleae 5.5–6.5 mm, 3-toothed (apices hairy). Ray florets 8–15; laminae 15–22 mm (abaxial faces gland-dotted). Disc florets 40+; corollas 5–6 mm, lobes yellow; anthers dark brown to black, appendages dark or reddish brown. Cypselae 3–4 mm, glabrate; pappi of 2 aristate scales 1.5–2 mm. 2n = 68.
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