Annuals, 30–100 cm. Stems (often reddish) erect, hairy. Leaves mostly cauline; mostly alternate; petioles 0.7–2.5 cm; blades lance-linear to lance-ovate or ovate, 3–15 × 0.5–3 cm, bases cuneate, margins usually entire or shallowly serrate, abaxial faces gland-dotted. Heads 1–7. Peduncles (1–)3–13(–20) cm. Involucres hemispheric, 15–20 mm diam. Phyllaries 12–17, lanceolate, 8–17 × 3–4 mm, apices narrowed gradually, abaxial faces hirsute . Paleae 9.5–10 mm, 3-toothed (middle teeth surpassing discs, apices greenish or yellow-brown, glabrous). Ray florets 10–13; laminae 14–20 mm. Disc florets 50+; corollas 4–6 mm, lobes reddish; anthers reddish purple, appendages usually purplish (style branches reddish or yellow). Cypselae (2.5–)3–3.5(–4) mm, glabrate; pappi of 2 lanceolate scales 1.7–2.7 mm. 2n = 34.
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