Rhizomatous perennial herb to c. 60 cm high, moderately pubescent. Leaves to c. 8 cm long, 1-or 2-pinnatisect, ±planar in fresh state; rachis of mid-stem leaves 1.3–2.5 mm wide, often dentate between primary segments. Capitula in dense corymbiform inflorescences, 6–9 mm diam.; peduncle to c. 0.7 cm long, moderately hairy; involucre 4.0–5.5 mm long; bracts keeled; outer and middle series of bracts with margin unpigmented or brown; inner bracts with hyaline extension c. 0.3 mm long; paleae c. 5 mm long. Ray florets c. 5; ligule 1.5–3 mm long, purple. Disc florets 8–20; corolla c. 2.5 mm long; tube narrower than and ±as long as limb; limb purple. Achenes c. 2 mm long.