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Montana Field Guide

Montana Field Guides

Anderson's Aster - Oreostemma alpigenum
Other Names:  Aster alpigenus

Native Species

Global Rank: G5
State Rank: S4

Agency Status
MNPS Threat Rank:
C-value: 4

External Links

General Description
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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety haydenii (Porter) G.L. Nesom.

Species Range

Range Comments
WA to MT south to CA, NV and WY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 43

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Stony, often sparsely vegetated fellfields, turf, meadows; upper subalpine, alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Hulten, E. 1968. Flora of Alaska and Neighboring Territories. Stanford University Press, Stanford, CA.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Murray, D.F. 1980. Threatened and endangered plants of Alaska. U.S. Forest Service and Bureau of Land Management, Washington, D.C. 59 pp.
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Citation for data on this website:
Anderson's Aster — Oreostemma alpigenum.  Montana Field Guide.  .  Retrieved on , from