Boltonia asteroides l'hér. Hill

Plants 30–200 mm; stoloniferous. Stems erect. Leaf blades linear or lanceolate to oblanceolate; cauline 20–220 × 2–30 mm, bases not decurrent . Heads usually in corymbiform, sometimes paniculiform arrays, branches spreading to ascending, most bracts leaflike, 15–120 × 2–18 mm. Peduncles 5–220 mm; bracts 0–15, linear to subulate or ovate to oblanceolate, 2–12(–62) mm. Involucres 3–5 × 4–14 mm. Phyllaries in 3–5 series, subulate, linear, lanceolate, or spatulate, subequal, 0–6 merging down peduncles; outer 1.5–3.8 × 0.4–1.6 mm; inner 2.1–4 × 0.3–1.5. Ray florets 20–60; corollas white to lilac, laminae 5–13 mm, tubes 0.5–1.7 mm. Disc florets 65–170; corollas 1.5–2.6 mm. Cypselae obovoid, 1–3 × 0.8–2 mm, wings 0.1–0.5 mm wide; pappi awns 0.4–2 mm (lengths ± 2 / 3 cypselae).