Lolium perenne

perennial ryegrass, perennial rye grass, italian rye grass
Family

Poaceae

Leaf Arrangement

alternate

Leaf Attachment

sheathing

Leaf Margin

entire

Leaf Type

simple

Leaf Shape

linear

Growth Form

graminoid

Flower Color

inconspicuous

Flower Month

March - July

Height (meters)

0.3 - 1.0

Milky Sap

No

Armed/Unarmed

Unarmed

Origin

introduced

Lifespan

annual, perennial

Growing Season

Cool season


Wetland Class

FACU

Prairie Coefficient of Conservatism

-1

Field Characters

Spikelets alternate on spike protruding from spike at 45 degree angle. Tuft of white hairs at point of attachment of spikelets. Membranous ligule. Look alikes: L. multiflorum – awn on lema and no hairs, L. tomulantum large bract subtending each spiklet and exceeding it in length.

Cultural Information

Commercial seeds have a purity of 98%, a germination rate of 90% and there are about 227,000 seeds/lbs. The seeds should be planted in the fall at a rate of 25-35 lbs/acre (USDA 1948).

Animal Use

Wildlife use of this grass is considered negligible except in California. It is unclear if how well researched the plant is in other areas (Martin et al. 1951). It is planted in pastures where Geese feed on it at south Louisiana Wildlife Refuges.

Natural History

A native of Europe that is now naturalized nearly throughout the United States. It has been suggested as a fuel species that might be added to seed mixes for restoration. It burns well and is not a vigorous reseeder. Many believe it to be allelopathic.

Habitat

Lawns, old fields, disturbed areas.