Erect perennial herb 30–70 cm high, with a deep spreading rhizomatous rootstock and sparsely scabrous erect branches. Leaves sessile, linear to narrowly lanceolate, (40–) 50–100 mm long, (3–) 5–10 (–15) mm wide, usually entire, rarely with remote teeth near base, acute, shortly appressed-scabrous. Capitula 10–15 mm diam.; peduncles 2–6 cm long; involucral bracts 20–28, equisized, 6–10 mm long; paleae membranous, soft, subhyaline, with a midrib and several longitudinal striae, shortly scabrous on apical margins and dorsally towards tip. Ray florets 10–15; ligule 2-or 3-lobed, bright yellow. Disc florets c. 30–50; corolla yellow. Achenes obcuneate, 3.5–4 mm long, 3 mm wide, with corky exocarp, weakly furrowed basally, rugose, truncate and slightly sunken apically, with sparse short hairs on apex. Pappus a connate ring of very short acute scales.
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Leaf blades mostly 5–10 cm. Ray laminae 10–15 mm. Cypselae 5–6 mm. 2n = 66 (South America).
A weed of lawns, playing fields, railway reserves, cultivation and along drains, sometimes invading natural open forest.
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