Hymenopappus biennis B.L.Turner

Biennials, 60–100 cm. Leaves: basal 2-pinnate, 6–16 cm, lobes 6–20 × 1(–3) mm; cauline 10–40. Heads 20–40 per stem. Peduncles 1–6 cm. Phyllaries yellowish, 5–8 × 3–5 mm. Ray florets 8; corollas white, laminae (6–)14–16 mm. Disc florets 32–50+; corollas yellowish, 3–3.5 mm, tubes 1.5 mm, throats campanulate, 1.5–2 mm, lengths 2–3 times lobes. Cypselae 4 mm, glabrous; pappi 0 or of scales 0.1–0.2 mm. 2n = 34.