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Montana Field Guide

Montana Field Guides

White Bluegrass - Poa glauca
Other Names:  Poa rupicola

Native Species

Global Rank: G5
State Rank: S4

Agency Status
MNPS Threat Rank:

External Links

General Description
Perennial bunchgrass. Stems 10–20 cm. Leaves: blades mostly 1–2.5 mm wide, ligules 1–4 mm long. Inflorescence a narrow panicle 2–8 cm long. Spikelets 4–6 mm long. Lemmas covered with few hairs or hairy to sometimes cobwebby on keel and marginal veins (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Throughout the Rocky Mountain regions and at higher latitudes in N. America (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range


Observations in Montana Natural Heritage Program Database
Number of Observations: 91

(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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    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Martin, S.A. 1985. Ecology of the Rock Creek bighorn sheep herd, Beartooth Mountains, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 152 p.
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Citation for data on this website:
White Bluegrass — Poa glauca.  Montana Field Guide.  .  Retrieved on , from