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Perennial Rye Grass (Lolium perenne)

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Home « Lolium « Lolium perenne
Family: POACEAE
Genus: Lolium
Species: Perennial Rye Grass (Lolium perenne)
Alternative Names: Lolium multiflorum

Perennial Rye Grass Species Description

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These plants are from foreign areas (those that occur outside of North America north of Mexico) that have been released intentionally or unintentionally. Plants that have been disseminated or escaped as a result of human activity, and become established somewhere within the United States, Canada or Greenland.

Allergenicity: Perennial Rye Grass (Lolium perenne) is a severe allergen.

Pollination: Occurs in following seasons depending on latitude and elevation: Spring to Fall.

Angiosperm - Flowering Monocot: Plants in this group have one embryonic leave (single cotyledon). This group include the grasses, lilies, orchids and palms.

Forb: A broad-leaved herb other than a grass, especially one growing in a field, prairie, or meadow.

Grass/Grass-like: Any plant characterized by parallel-veined leaves that arise from nodes in the stem, wrap around it for a distance, and leave, especially those grown as ground cover rather than for grain.

Weed: Any plant growing in cultivated ground to the injury of the crop or desired vegetation, or to the disfigurement of the place; an unsightly, useless, or injurious plant.

Annual: Plants in which the entire life cycle is completed within one growing season.

Perennial: Living for many years.

Wetland Plant: Plants growing in aquatic or wetland habitats. These include all known floating, submerged, and emergent taxa, plus those that are found in permanently or seasonally wet habitats.

Herbaceous Stem: Not woody, lacking lignified tissues.

Perennial Rye Grass Species Usage

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Perennial Rye Grass Species Location

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The shaded areas on the map indicates where the species has been observed in the United States. Click the map to see a full scale version of these allergy areas.
  - Native, observed in a county
  - Introduced, observed in a county
  - Rarely observed
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