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Achenes reddish-brown, 4.5–5 x 1.75–2 mm. (including the c. 0.5 mm. long beak) flattened-ellipsoid, margins swollen, narrowly 1-ribbed, rarely 2–3-ribbed on each face, hispidulous; pappus several-seriate of white, barbellate setae c. 5–6 mm. long.
Synflorescences paniculate up to 40 cm. long, occasionally much reduced and spicate; branches up to c. 15 cm. long, patent-ascending, bracteate, or much reduced.
Florets c. 5 per capitulum; corollas yellow, up to c. 11 mm. long, the tube c. 5 mm. long, cylindric, glabrous; ligule c. 6 mm. long, lorate, erect.
Involucres 7–9 x 1.5–2 mm. at time of flowering, increasing to 12 x 2.5 mm. in fruiting capitula, cylindric, glaucous to purple-tinged.
Phyllaries ciliolate above otherwise glabrous, the outermost ± narrowly ovate, the innermost up to 11 x 2.5 mm., narrowly lanceolate.
Stems solitary, branched above, glabrous or sparsely glandular-setulose, often purple-tinged.
An erect perennial herb to c. 120 cm. tall, from a semi-woody narrowly turbinate taproot.
Capitula stalked or subsessile, solitary or in clusters of 2–4.
