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2c. Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartman var. mucronata (Greene) D. R. Morgan & R. L. Hartman, Sida. 20: 1394. 2003.
Machaeranthera mucronata Greene, Pittonia 4: 72. 1899; M. bigelovii (A. Gray) Greene var. mucronata (Greene) B. L. Turner
Leaf blades linear to linear-oblanceolate, mid 20–80 × 2–6 mm, margins entire, faces glabrate, puberulent, or canescent. Involucres hemispheric, 8–12 mm, widths 2–3 times heights. Phyllaries 90–100, 0.5–1 mm wide (at midpoint), apices long-acuminate, 2–5 mm. Ray florets 20–60. 2n = 8.
Flowering Aug–Sep. Meadows and open areas in coniferous forests; 2400–3000 m; Ariz.
Variety mucronata is known from the Kaibab Plateau (northcentral Arizona).
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