Herb to 0.7 m high. Stems white, thinly pilose with yellow to white glandular hairs to 0.15 mm long. Leaves pinnatilobed, green above and below; ±sessile glands present on both surfaces; marginal spines 3–6 mm long, yellow-brown distally. Capitula solitary, terminal on 4–20 cm long branches; involucre ovoid, 8–10 mm diam. at anthesis excluding patent bracts; outer involucral bracts 2–3 times length of inner; median bracts suberect, 12–15 mm long, 3.5–4.5 mm wide at widest point, entire, rigidly spinose at apex, glandular. Corolla pink-purple; tube 10–13 mm long; lobes 2.5–3 mm long. Anthers 2.5–3 mm long. Achenes obpyramidal, 3–3.5 mm long, grey. Pappus bristles 87–108, longest ones 4.5–5.3 mm long.
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