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1. Atrichoseris platyphylla (A. Gray) A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 410.
Malacothrix platyphylla A. Gray, Proc. Amer. Acad. Arts 9: 214. 1874
Stems glaucous. Basal leaves gray-green, glaucous, often purple-tinged, especially abaxially, often adaxially mottled, 1–12 × 0.5–6 cm. Heads 1.5–3.5 cm diam. Involucres 6–10 mm. Florets: corollas 8–20 mm, inner with bases yellow or purple, much shorter than outer. Cypselae 4–4.5 mm. 2n = 18.
Flowering Feb–May. Dry desert slopes, valleys, and washes; 0–1400 m; Ariz., Calif., Nev., Utah; Mexico (Baja California).
Atrichoseris platyphylla grows in the Mojave and Sonoran deserts.
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