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Montana Field Guide

Montana Field Guides

Arctic Bluegrass - Poa arctica
Other Names:  Poa grayana

Native Species

Global Rank: G5
State Rank: S4

Agency Status
MNPS Threat Rank:
C-value: 4

External Links

General Description
Rhizomatous perennial. Stems 20–60 cm. Leaves: blades 2–5 mm wide, basal; ligules 2–7 mm long. Inflorescence an open pyramidal panicle 4–12 cm long. Spikelets 5–8 mm long. Lemmas with cobwebby hairs at base, conspicuously hairy on keel and margin veins at least on the lower half (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range


Range Comments
At higher latitudes in North America, and throughout the Intermountain and, Rocky Mountain regions, and much of the Pacific Northwest (Lavin in 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)


  • Additional ReferencesLegend:   View Online Publication
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    • Hawkins, P.H. 1903. The alpine flora of Montana. M.Sc. Thesis, Bozeman, MT: Montana State University. 24 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Saunders, J.K., Jr. 1954. A two-year investigation of the food habits and range use of the Rocky Mountain goat in the Crazy Mountains, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 22 p.
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Citation for data on this website:
Arctic Bluegrass — Poa arctica.  Montana Field Guide.  .  Retrieved on , from