Plants (10–)70–150 cm. Stems usually simple, often with short, leafy branches proximally. Heads 20–100, in open, diffuse arrays, primary branches longer than peduncles. Involucres 5–6.2 mm. Phyllaries 30–42, sub-ulate to lanceolate, narrow, green zones narrowly lanceolate. Ray florets (23–)27–37(–42) in (1–)2 series; laminae usually white, sometimes pink, 1.9–3 × 0.2–0.5 mm, longer than pappi, drying in 1–2 coils (apices shallowly to deeply lobed). Disc florets (6–)8–15; corollas 3.4–4.4(–4.7) mm. Cypselae 1.5–2.7 mm; pappi 3.5–3.8(–4.2) mm. 2n = 10.
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