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1. Chaetadelpha wheeleri A. Gray ex S. Watson, Amer. Naturalist. 7: 301. 1873.
Leaves: basal blades 3–50 × 2–4 mm. Involucres 11–14 × 3–4 mm. Calyculi: bractlets 2–4 mm. Cypselae 8–11(–12) mm; pappi: awns 8–11 mm, bristles 20–30% shorter. 2n = 18.
Flowering May–Jul. Dunes, sandy soils and alkali flats in creosote bush scrub, sagebrush scrub; 800–1800 m; Calif., Nev., Oreg.
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