Perennials, to 200 cm (robust, glaucous). Stems erect to subdecumbent. Leaves sessile; blades oblong-ovate to lanceolate or hastate, (20–)30–100 × 10–40(–50) mm, bases connate-perfoliate, margins entire. Heads 25–150+ in paniculiform arrays. Calyculi of 1(–2) linear-lanceolate bractlets ca. 2 mm. Involucres oblong-urceolate, 5–7 mm. Phyllaries 5, oblong-lanceolate. Ray florets 0. Disc florets 9–14; corolla tubes 1.2–1.4 mm, throats narrowly funnelform, 2 mm. Cypselae narrowly oblanceolate to linear, 2.5–3 mm; pappi usually of 2–4 unequal, hyaline scales 0.2–1 mm, usually on 1 shoulder, rarely 0. 2n = 36.
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