Erect annual herb 30–90(–120) cm tall; stems glabrous.. Leaves sessile, oblanceolate, narrowly elliptic or almost linear, 2.4–13 cm long, 0.2–1 cm wide, base attenuate, margins subentire or minutely sinuate-dentate, apex obtuse, glabrous or almost so.. Capitula 2 or more in lax corymbs, discoid; stalks of the individual capitula long, glabrous; involucre cylindrical, 5–7.5 mm long, 1.5–2.5 mm in diameter; phyllaries 7–13, usually 8, 4.5–7 mm long, glabrous.. Ray florets absent; disc florets yellow or orange; corolla 5.7–8 mm long; tube glabrous; lobes 0.5–0.8 mm long.. Achenes 2.2–3.4 mm long, angular, pubescent; pappus 4–6 mm long.
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