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Montana Field Guide

Montana Field Guides

Rough Bluegrass - Poa trivialis
Other Names:  Rough-stalked Bluegrass, Rough Meadow-grass, Scribner's Bluegrass

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 1

External Links

General Description
Perennial rhizomatous. Stems loosely bunched, 40–100 cm tall, often decumbent and rooting at nodes. Leaves: blades 2–5 mm wide, lax, somewhat scabrous, ligules 3–10 mm long. Inflorescence an oblong open panicle 8–25 cm long. Spikelets 3–5 mm long. Lemmas 2.5–3.5 mm long, with a cobwebby base, keeled (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced throughout much of North America (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 21

(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
    Do you know of a citation we're missing?
    • Ament, R.J. 1995. Pioneer Plant Communities Five Years After the 1988 Yellowstone Fires. M.Sc. Thesis. Bozeman, MT: Montana State University. 216 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:
Rough Bluegrass — Poa trivialis.  Montana Field Guide.  .  Retrieved on , from