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7a. Thymophylla aurea (A. Gray) Greene var. polychaeta (A. Gray) Strother, Sida. 11: 376. 1986.
Hymenatherum polychaetum A. Gray, Smithsonian Contr. Knowl. 3(5): 116. 1852; Dyssodia aurea (A. Gray) A. Nelson var. polychaeta (A. Gray) M. C. Johnston; D. polychaeta (A. Gray) B. L. Robinson; Thymophylla polychaeta (A. Gray) Small
Plants to 30 cm. Peduncles 20–70 mm. Pappi of 18–20, 3–5-aristate scales 2–3 mm. 2n = 16.
Flowering late summer. Grasslands and desert scrub-lands; 1000–1500+ m; N.Mex., Tex.; Mexico (Chihuahua, Coahuila, Durango).
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