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1a. Dieteria asteroides Torrey var. asteroides
Aster canescens Pursh var. tephrodes A. Gray; A. tephrodes (A. Gray) S. F. Blake; Machaeranthera tephrodes (A. Gray) Greene
Stems hairy to canescent, sometimes sparsely glandular. Leaves: mid blades 6–20 mm wide, margins usually serrate or serrulate, faces puberulent or canescent, sometimes sparsely stipitate-glandular. Involucres hemispheric, 8–15 mm. Phyllary apices long-acuminate, 3–6 mm, faces puberulent or canescent, sparsely stipitate-glandular. 2n = 8.
Flowering Jul–Oct. Grasslands, creosote bush scrublands, pine/oak woodlands, often along streams; 300–2400 m; Ariz., Calif., Nev., N.Mex.; Mexico (Chihuahua, Sonora).
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