Annual erect herbs (10–) 30–50 (–80) cm high; stems red to brownish, slightly pubescent. Leaves with winged petiole 10–20 mm long (rarely sessile); lamina lanceolate to elliptic, 35–100 mm long, 6–30 (–50) mm wide, scaberulous above and below (mainly on veins below), often sessile-glandular below, attenuate at base, entire, shortly and bluntly dentate, or lobed. Capitula in loose corymbose panicles, 10 mm diam.; involucral bracts linear to oblanceolate, 4–7 (–13) mm long, shorter than, equalling, or rarely exceeding florets (up to twice length), pilose, lacking stalked glandular hairs (small sessile glands sometimes present); outer paleae green to purplish, coarsely stalked-glandular, enfolding the outer achenes; inner paleae obovate, 3 mm long, membranous, become whitish, flattened. Florets yellow. Ray florets 5–8; ligules 1–2 (–3) mm long, broadly oblong, 2 or 3-toothed at apex, yellow. Achenes slightly 3-or 4-angled, incurved, c. 3 mm long, black.
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