Anderson's Aster - Oreostemma alpigenum
Taprooted perennial with a mostly simple caudex. Stems simple, lax to ascending, 2–10 cm. Herbage glabrous, villous above. Leaves: basal petiolate, linear to oblanceolate, 2–8 cm long, entire; cauline linear 5–30 mm long. Heads solitary, radiate; involucre turbinate to campanulate, 7–11 mm high; phyllaries in 3 or 4 series, green and purple, linear-lanceolate, ciliate, sparsely villous, little overlapping. Ray flowers female, 10 to 45, violet; ligules 7–12 mm long. Disk flowers perfect, yellow; corollas 6–9 mm long; style branches with linear-lanceolate appendages. Pappus of numerous, stramineous, barbellate, capillary bristles. Achenes usually 5- to 10-nerved, ca. 2 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX
Our plants are variety haydenii
(Porter) G.L. Nesom.
Stony, often sparsely vegetated fellfields, turf, meadows; upper subalpine, alpine (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX