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Montana Field Guide

Montana Field Guides

Perennial Ryegrass - Lolium perenne
Other Names:  Perennial Ryegrass, English Ryegrass, Winter Ryegrass, Ray Grass

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

External Links






 
General Description
Perennial bunchgrass. Stems 30–150 cm. Leaves: blades 2–5 mm wide. Inflorescence 5–25 cm long. Spikelets 7–19 mm long, glumes about as long as an individual floret. Lemmas mostly 5 to 9 per spikelet, keeled, awnless or awn-tipped (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: 5

(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
Regularly disturbed sites, roadsides, trailsides, and newly planted lawns (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Perennial Ryegrass — Lolium perenne.  Montana Field Guide.  .  Retrieved on , from