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Montana Field Guide

Montana Field Guides

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


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

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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
Present
 


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

Summary of Observations Submitted for Montana
Number of Observations: 2

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

Recency

 

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



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

References
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Citation for data on this website:
Anderson's Aster — Oreostemma alpigenum.  Montana Field Guide.  .  Retrieved on , from