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Montana Field Guide

Montana Field Guides

Kentucky Bluegrass - Poa pratensis

Exotic Species (not native to Montana)

Global Rank: G5
State Rank: SNA

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

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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
Present
 


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

Summary of Observations Submitted for Montana
Number of Observations: 461

(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.
    • 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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  • Additional Sources of Information Related to "Monocots"
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Citation for data on this website:
Kentucky Bluegrass — Poa pratensis.  Montana Field Guide.  .  Retrieved on , from