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Montana Field Guides

Bulbous Bluegrass - Poa bulbosa
Other Names:  Bulbous Meadow-grass

Non-native Species

Global Rank: GNR
State Rank: SNA
C-value: 0

Agency Status


External Links

General Description
Perennial bunchgrass. Stems 20–60 cm, with a bulbous base. Leaves: blades 1–2.5 mm wide, mostly basal; ligules 1–3 mm long. Inflorescence a contracted panicle, 3–10 cm long. Spikelets 4–15 mm long. Lemmas usually transformed into small vegetative bulbs, hairy along veins. Roadsides, trailsides, open dry sites (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range


Range Comments
Introduced throughout most of the U.S. Sometimes seeded in open range to compete with less desirable colonizing grasses (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 650

(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)



  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Bess, J.A. 1997. The leafhopper species assemblages associated with native and replanted grasslands in southwest Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University. 94 p.
    • Brey, C.W. 1998. Epidemiology of wheat curl mite (Aceria tosichella K.) and wheat streak mosaic virus on feral grass species and effect of glyphosate on wheat curl mite dispersal. Ph.D. Dissertation. Bozeman, MT: Montana State University. 136 p.
    • Carroll, M.W. 1998. Influence of a legume covercrop on volunteer wheat, the wheat curl mite, Aceria tosichella (K.) and wheat streak mosaic virus. M.Sc. Thesis. Bozeman, MT: Montana State University. 78 p.
    • Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.
    • Johnson, T. W. 1982. An analysis of pack and saddle stock grazing areas in the Bob Marshall Wilderness. M.Sc.Thesis. Bozeman, MT: Montana State University. 105 p.
    • Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
    • Rinella, M.J., A.D. Knudsen, J.S. Jacobs, and J.M. Mangold. 2020. Seeding causes long-term increases in grass forage production in invaded rangelands. Rangeland and Ecology Management 73(2020): 329-333.
    • Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
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Citation for data on this website:
Bulbous Bluegrass — Poa bulbosa.  Montana Field Guide.  .  Retrieved on , from