Perennial herb, 5–100 cm high, branched; taproot stout, with white latex, root-crown with reduced leaves; stems glabrous except for the part closest to the capitulum.. Leaves grey-green, linear, 3.5–13 cm long, 0.2–0.5 cm wide, base attenuate to sagittate-auriculate, margins entire or remotely denticulate, apex attenuate, glabrous or very sparsely pilose.. Capitula solitary or up to 3 in lax leafy cymes, the very base tomentose; involucre 12–17 mm long; phyllaries tinged purple, lanceolate, 4–17 mm long, margins membranous, entire or (in the outermost) spinulose, acute, distally ciliate, thickened at the base after flowering.. Florets ± 100 per capitulum; corolla yellow, the outermost purplish beneath, tube 5–9.5 mm long, distally pilose, ligule 3.5–4.5 mm long.. Achenes brown, ellipsoid, flattened, 2.5–3.5 mm long, ribbed, rugose; pappus 6.5–8 mm long, ?persistent.
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