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Achenes 2–3.5 mm. long, obconic-turbinate, truncate above, 4–5-angled, finely 12–15-ribbed, scabridulous or glabrous; pappus of numerous persistent barbellate setae 5–7 mm. long, equalling or slightly exceeding the involucre in length, sometimes with an outer series of minute setae.
Involucres up to c. 14 x 10 mm., obconic; phyllaries 2-seriate subequal 8–10 mm. long, narrowly lanceolate, attenuate to the apex, araneose-lanate and papillose-glandular outside; outer phyllaries often with a thickened verruculose midrib, changing ± abruptly into the bracteoles.
Florets numerous; corolla tube 5–7 mm. long, cylindrical, crisped-pubescent on the outside; ligule 7–10 mm. long, erect, strap-shaped, strigose to pilose on the outside, drying greenish, apical lobes up to 2 mm. long papillose.
Stems annual, solitary, often flexuous, simple below and branching above, striate, ± densely pilose below and sparsely so or glabrescent above.
Capitula few to many, laxly corymbiform cymose or paniculate, capitula stalks up to c. 40 cm. long, ± Hexuous, with 2–23 subulate bracts.
An erect perennial herb up to c. 100 cm. tall from a semi-woody taproot; root-crown lanate.
