Annuals, 130–200 cm. Stems erect, glabrous or ± hispid. Leaves mostly cauline; opposite (proximal) or mostly alternate; petioles 1.5–6 cm; blades lanceolate to lance-ovate, 7–17.5 × 1.7–8.5 cm, bases cuneate, margins entire or (larger leaves) toothed, abaxial faces ± scabrous, not gland-dotted. Heads 1–5. Peduncles 12–18 cm. Involucres hemispheric, 15–20 mm diam. Phyllaries 15–25, lanceolate to lance-ovate, 6–19 × 0.7–4 mm (equaling or slightly surpassing discs), (margins ciliate) apices (spreading to recurved) acuminate, abaxial faces usually glabrate or sparsely hispid. Paleae 8–9 mm, apices 3-toothed (apices glabrous). Ray florets 12–20; laminae 20–30 mm. Disc florets 50+; corollas 5–5.5 mm, lobes reddish; anthers dark, appendages yellowish or dark (style branches reddish). Cypselae 3–4 mm, glabrous; pappi of 2 lanceolate scales 2.5–2.9 mm. 2n = 34.
Home