Hymenoxys ambigens var. floribunda (A.Gray) W.L.Wagner

Plants 30–150 cm. Heads (25–)100–350+. Phyllaries: outer 3–4, basally connate 3/4 their lengths, 4–6 mm, apices rounded to usually obtuse to sometimes acute; inner 3–4, 3.2–4 mm, apices rounded or obtuse to weakly acute or mucronate. Ray florets 3–4; corollas 4.5–6 × 2–2.5 mm. Disc florets 6–13. Cypselae 3–3.5 mm, hairs strongly wavy; pappi 0 or of 2–4 scales 1–2 mm. 2n = 30.