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Montana Field Guide

Montana Field Guides

Italian Ryegrass - Lolium multiflorum
Other Names:  Annual Ryegrass, Lolium perenne ssp. multiflorum

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Non-native Species

Global Rank: GNRTNR
State Rank: SNA
C-value: 1


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Biennial to short-lived perennial bunchgrass. Stems 20–150 cm, often single-stemmed in lawn settings. Leaves: blades 3–6 mm wide. Inflorescence 15–40 cm long. Spikelets 10–30 mm long, glumes about as long as an individual floret. Lemmas often 10 to 20 per spikelet, keeled, at least the upper ones with an awn 5–15 mm long (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced throughout much of North America (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: 13

(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, and newly planted lawns (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Management


References
  • 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?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
    • Murphy, C.Y. 2016. Chemical control and disease reservoir studies of the wheat curl mite (Aceria tosichella Keifer) vector to wheat streak mosaic virus. M.Sc. Thesis. Bozeman, MT: Montana State University. 75 p.
  • Web Search Engines for Articles on "Italian Ryegrass"
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Citation for data on this website:
Italian Ryegrass — Lolium multiflorum.  Montana Field Guide.  .  Retrieved on , from