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Montana Field Guides

Kentucky Bluegrass - Poa pratensis
Other Names:  Smooth Meadowgrass, Common Meadowgrass

Non-native Species

Global Rank: G5
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 0

External Links






 
General Description
Perennial rhizomatous sodgrass. Stems 10–80 cm. Leaves: blades 2–4 mm wide, mostly basal; ligules 1–2 mm long. Inflorescence an open pyramidal panicle, 3–13 cm long. Spikelets 4–6 mm long. Lemmas with a cobwebby base and hairy along the mid and margin veins (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
The genus Poa is distinguished by its flat leaf blades, 2-6 flowered panicles, 1-3 nerved glumes and tuft of cobwebby hairs at the base of the 5-nerved lemmas (Gleason 1957, Mohlenbrock 1972, Hitchcock 1950).

Species Range
Montana Range

Non-native
 


Range Comments
Throughout all of North America especially at more northern latitudes or higher elevations (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 4682

(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
Low to high elevations in open vegetation, roadsides, dry meadows, lawns, and riparian habitats. Introduced and native and a fairly aggressive colonizer (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Additional ReferencesLegend:   View Online Publication
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    • Bookman, P. 1983. Microsite utilization by Bromus tectorum L. and Poa pratensis L. in a meadow steppe community. Oecologia 56:413-418.
    • Buckmaster, 2015. Community Composition Analysis of Altered Vegetation Communities Following the Release of Grazing Pressure. M.Sc. Thesis. Bozema, MT: Montana State University. 66 p.
    • Chadde, S.W. 1985. Initial recovery patterns of southwestern Montana foothill range. M.Sc. Thesis. Bozeman, MT: Montana State University. 103 p.
    • Conway, T.M. 1982. Response of understory vegetation to varied lodgepole pine (Pinus contorta) spacing intervals in Western Montana. M.Sc. Thesis. Bpzeman, MT: Montana State University. 76 p.
    • Grove, A.J. 1998. Effects of Douglas fir establishment in southwestern Montana mountain big sagebrush communities. M. Sc.Thesis. Bozeman, MT: Montana State University. 150 p.
    • Guenther, G.E. 1989. Ecological relationships of bitterbrush communities on the Mount Haggin Wildlife Management Area. M.Sc. Thesis. Bozeman, MT: Montana State University. 73 p.
    • Husby, P.O. 1982. Effects of grazing on vegetation in the Artemisia tridentata-Festuca idahoensis habitat type. M.Sc. Thesis. Bozeman, MT: Montana State University. 76 p.
    • 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.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Martin, D. W. and J. C. Chambers. 2001. Effects of water table, clipping, and species interactions on Carex nebrascensis and Poa pratensis in riparian meadows. Wetlands 21:422-430.
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Citation for data on this website:
Kentucky Bluegrass — Poa pratensis.  Montana Field Guide.  .  Retrieved on , from