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1. Hymenothrix wislizeni A. Gray, Mem. Amer. Acad. Arts, n. s. 4: 102. 1849.
Annuals, 30–70 cm. Phyllaries 8(–12), mostly linear to narrowly oblanceolate. Rays 3–8. Disc florets 15–30; corollas creamy to bright yellow, mostly 5–7 mm, lobe lengths 0.3–1 times throats; anthers yellowish. Cypselae 3–5 mm; pappus scales 1.5–6 mm. 2n = 24, 48.
Flowering summer–fall. Open slopes and washes, sandy or gravelly soils; 600–1500 m; Ariz., N.Mex.; Mexico (Chihuahua, Sonora).
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