Oreostemma alpigenum var. haydenii (Porter) G.L. Nesom
Family: Asteraceae
[Aster alpigenus subsp. haydenii (Porter) Cronquist,  more...]
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Stems 4-10(-15) cm. Basal leaf blades linear-oblanceolate to narrowly oblanceolate, (30-)40-90(-120) × (1-)2-4(-6) mm, apices acute. Cypselae strigose only distally.

Flowering (Jun-)Jul-Sep. Rocky slopes, talus, ridges, usually in alpine tundra, sometimes in clearings in pine-fir or pine-spruce woods, sometimes around lake edges or near snow banks, usually in drier sites; 2600-3300 m; Idaho, Nev., Oreg., Wyo.