NPSpecies

Data Source: White and Pyne 2003

Introduced from Eurasia.; Data Source: http://plants.usda.gov, 10 August 2007 Legacy NPSpecies information may no longer be applicable, please remove if it is not applicable. In legacy NPSpecies Weedy value was Yes with comment: Field, roadsides, pastures, disturbed areas; common (Weakley 2007) In legacy NPSpecies Pest value was Yes with comment: Natureserve I-Rank: I-Rank: Medium. I-Rank Reasons Summary: Lolium perenne occurs in all 50 states and the District of Columbia. It is used as a lawn and pasture grass. Lolium perenne often escapes on roadsides and in disturbed areas. It also invades grasslands, meadows, and vernal pools, especially in California. Apparently most of its negative impacts on biodiversity are in California. Lolium perenne can spread quickly and forms dense swards that displace native species. It threatens a federally threatened butterfly in serpentine grassland in California because it displaces the butterfly's primary larval food plant. Depending on environmental conditions, Lolium perenne may behave as an annual, biennial, short-lived perennial, or perennial. Seed production is prolific. Several management techniques are effective in controlling Lolium perenne including burning, mowing, grazing, and herbicides. Lolium perenne includes both Lolium perenne ssp. multiflorum (often called L. multiflorum) and Lolium perenne ssp. perenne.

Park Species Data Source: White and Pyne 2003