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Montana Field Guide

Montana Field Guides

Western Aster - Symphyotrichum ascendens
Other Names:  Aster chilensis ssp. adscendens, Aster adscendens, Aster ascendens

Native Species

Global Rank: G5
State Rank: S5

Agency Status
MNPS Threat Rank:
C-value: 3

External Links

General Description
Rhizomatous perennial. Stems ascending to erect, 15–60 cm. Herbage glabrate to strigose. Leaves cauline, sessile or subsessile, glabrate to scabrous, ciliate, linear to linear-oblanceolate, entire, 2–10 cm long, the lowest deciduous. Inflorescence paniculate; peduncles strigose. Involucre campanulate, 5–7 mm high; phyllaries well imbricate, oblanceolate, strigose, white below, green-tipped. Rays 15 to 40, blue to pink; ligules 5–10 mm long. Disk flowers 15 to 40, yellow, often purple-tipped; corolla 4–7 mm long. Achenes obconic, 2–3 mm long, pubescent (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range


Range Comments
BC to SK south to CA, AZ, NM and ND (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 145

(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)

Grasslands, dry meadows, sagebrush steppe, streambanks, roadsides; plains, valleys, montane (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?
    • Guenther, G.E. 1989. Ecological relationships of bitterbrush communities on the Mount Haggin Wildlife Management Area. M.Sc. Thesis. Bozeman, MT: Montana State University. 73 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Western Aster — Symphyotrichum ascendens.  Montana Field Guide.  .  Retrieved on , from