Annual herb 0.3–1.3 m high, usually erect; branches sulcate, scabrid-pilose.. Leaves (sub-)sessile or petiolate, ovate or narrowly ovate, 3–15 cm long, 1–5 cm wide, base cuneate or rounded and abruptly cuneate, margins subentire or shallowly serrate, apex acute, scabrid on both surfaces; 3-veined from base; petiole absent or to 18 mm long.. Capitula in axillary and terminal short corymbs; stalks of individual capitula to 3.5 cm long but usually much less; involucre 3-seriate, 7–18 mm long; outer phyllaries herbaceous, inner scarious, scabrid-pilose; paleae 6–9 mm long with the upper part almost appendiculate, acute or abruptly acuminate, ciliate.. Ray florets 5–15, yellow or pale yellow, style absent, ray 4–10 mm long, tube 1.7–3 mm, glabrous; disc florets yellow, 3.5–5.3 mm long, glabrous or nearly so; anther-appendages dark to black.. Achenes obovoid, ± compressed, 4.7–6 mm long, pilose; pappus a lacerate cupule to 0.5 mm high and usually without setae, sometimes with 2 setae to 2.5 mm long.
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