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2. Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartman, Sida. 20: 1394. 2003.
Aster bigelovii A. Gray in War Department [U.S.], Pacif. Railr. Rep. 4(5): 97. 1857; Machaeranthera bigelovii (A. Gray) Greene
Biennials or short-lived perennials. Stems, branches, and peduncles sometimes puberulent or canescent, stipitate-glandular. Leaf blades lanceolate to oblanceolate (linear to linear-oblanceolate in var. mucronata), mid 20–80 × (2–)5–15 mm, margins entire to irregularly dentate or serrate, faces glabrous or puberulent, often sparsely stipitate-glandular; distal bases usually cordate to auriculate, clasping. Involucres broadly turbinate to hemispheric. Phyllaries in 5–10 series, spreading to reflexed, apices long-acuminate, 2–6 mm, herbaceous (acute to acuminate, 1–3 mm in var. commixta), faces stipitate-glandular. Receptacles 4–9 mm diam. Ray florets pistillate, fertile; laminae blue to purple, 10–25 × 1–2 mm. Disc corollas 5–7(–8) mm. Cypselae sparsely appressed-hairy.
Varieties 3 (3 in the flora): w United States.
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| 1 |
Involucres hemispheric, widths 2–3 times heights; phyllaries 90–100, 0.5–1 mm wide (at midpoint), apices long-acuminate, 2–5 mm |
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2c Dieteria bigelovii var. mucronata |
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Involucres broadly turbinate to hemispheric, 1–2(–3) times heights; phyllaries 25–100, 1–2 mm wide (at midpoint), apices acute to long-acuminate |
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(2) |
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| 2 (1) |
Phyllaries 50–100, apices long-acuminate, 3–6 mm, ray florets 30–60 |
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2a Dieteria bigelovii var. bigelovii |
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Phyllaries 25–50, apices acute to acuminate, 2–4 mm; ray florets 12–30 |
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2b Dieteria bigelovii var. commixta |
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