Annual or perennial, 7–140 cm high, branched or rarely unbranched. Anchor hairs mainly 2-hooked. Peduncles 1–20 cm long; peduncular bracts absent or present, clearly separate from involucral bracts. Capitula few to c. 40, sometimes 1, 8–16 mm long and 3–10 mm wide at anthesis, 8–18 mm long and 5–10 (–12) mm wide in fruit. Involucre of (18–) 20–36 bracts in 2–3 outer and 2 inner rows, with longest outer bracts clearly to slightly shorter than inner bracts; outer involucral bracts straight, appressed or slightly squarrose, linear, lanceolate, oblanceolate or narrowly obovate, (1.7–) 2.3–12.0 mm long, 0.4–1.5 (–1.8) mm wide, not wider than inner bracts; margin glabrous; midrib glabrous or with 1–3 lines of straight hairs 0.7–2.2 (–3.4) mm long. Achenes including cuspis 2.9–10.7 (–12.5) mm long; cuspis 0.1–6.8 (–7.4) mm long, c. (1/30–) 1/17–1/2 of total achene length.
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