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3b. Hymenoxys ambigens (S. F. Blake) Bierner var. floribunda (A. Gray) W. L. Wagner, Brittonia. 51: 84. 1999.
Plummera floribunda A. Gray, Proc. Amer. Acad. Arts 17: 215. 1882; Hymenoxys microcephala Bierner
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.
Flowering Jun–Oct. Savannas, oak-juniper woodlands, pine forests; of conservation concern; 1500–2300 m; Ariz.
Variety floribunda is known from the Chiricahua, Dos Cabezas, Dragoon, Little Dragoon, and Mule mountains.
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