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1. Oreostemma alpigenum (Torrey & A. Gray) Greene, Pittonia. 4: 224. 1900.
Haplopappus alpigenus Torrey & A. Gray, Fl. N. Amer. 2: 241. 1842 (as Aplopappus); Aster alpigenus (Torrey & A. Gray) A. Gray
Plants 4–40 cm; stems, leaves, and phyllaries densely villous to glabrate, eglandular (at least some hairs always perceptible on distal stems and on proximal portions of phyllaries). Leaf blades oblanceolate. Phyllaries 1-nerved, herbaceous or slightly tawny-indurate proximally; outer 0.8–1.2 mm wide proximally.
Varieties 3 (3 in the flora): w United States.
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| 1 |
Plants 5–18(–30) cm; basal leaf blades oblanceolate (30–)60–100(–150) × 6–12 mm, apices obtuse to rounded |
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1a Oreostemma alpigenum var. alpigenum |
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Plants 8–40 or 4–15 cm; basal leaf blades linear-oblanceolate to narrowly oblanceolate, 30–120(–350) × (1–)2–6(–9) mm, apices acute |
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(2) |
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| 2 (1) |
Plants (4–)8–40(–70) cm; basal leaf blades (30–)80–120(–350) × (1–)2–6(–9) mm; cypselae strigillose |
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1c Oreostemma alpigenum var. andersonii |
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Plants 4–15 cm; basal leaf blades (30–)40–90(–120) × (1–)2–4(–6) mm; cypselae strigillose only distally |
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1c Oreostemma alpigenum var. haydenii |
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