Annual, erect, sparsely-branched herb, 20–40 cm high, glandular-pubescent and sparsely pilose. Leaves narrowly elliptic to oblong-spathulate, 2.5–10 cm long, to 2 cm wide, repand-dentate, acute, pubescent to scabrid; basal leaves cuneate; upper leaves smaller, auriculate. Capitula solitary, 1.5–2.5 cm diam.; peduncle to 2 cm long; involucre shallowly saucer-shaped, uniseriate; bracts 5–10 mm long, scabrous to pubescent. Ray florets 15–20, biseriate; ligules 1–1.2 cm long, light yellow. Disc florets yellow, with tube longer than limb. Achenes dimorphic; some outer achenes 2.5–4 cm long including 1.5–2 cm long, straight, sparsely hairy beak, winged or wingless, occasionally crested or toothed; median achenes much inflated, keeled; inner achenes cymbiform, numerous, muricate, with scattered hairs.
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