Annual herb 30–80 cm tall; stems erect, sparsely pubescent towards the base.. Leaves sessile, pale green, elliptic, obovate or the lowermost sometimes spatulate, 2–6 cm long, 0.3–1.8 cm wide, upper smaller and narrower, base cuneate, obscurely to coarsely sinuate-dentate or serrate, apex rounded or obtuse, sparsely pubescent, glabrescent.. Capitula numerous in lax terminal corymbs, radiate; involucre cylindrical, 5–5.5 mm long, 1.5 mm across; phyllaries 8, pale glaucous green, 4.5–5 mm long, glabrous.. Ray florets 4–6, yellow, tube 3 mm long, glabrous except at apex, rays 3.5–6 mm long, 1.5–2.5 mm wide, 4-veined; disc florets few, yellow, corolla 4 mm long, tube glabrous, lobes 0.5–0.7 mm long.. Achenes 1.2–1.5 mm long, glabrous; pappus 3.5 mm long.
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