Annual herb to 70 cm high. Lower stems with appressed white, non-glandular hairs; upper stems with both appressed and erect glandular hairs. Lower leaves simple and opposite; upper leaves trifoliate and alternate; all with appressed white hairs. Mid-cauline leaves petiolate; leaflet blades ovate, 1.5–6 cm long, 0.3–1.4 cm wide, entire, acute. Capitula numerous; involucre broadly turbinate, 4–7 mm diam. at anthesis; involucral bracts elliptic, 4–7 mm long, obtuse. Florets 15–25, white to pink, glandular-hairy; tube 1–1.5 mm long; lobes narrowly ovate, of varying lengths, 0.5–2 mm long; anthers 1.3–1.7 mm long. Achenes obpyramidal, 2.8–5 mm long, black, with appressed hairs. Pappus of 8 (9) scales, 0.3–2 mm long, obtuse to emarginate, without terminal awns or mucros.
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