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Perennial Ryegrass

Description

Perennial ryegrass is a bunch-type grass that is used for winter overseeding on sites where high quality and winter color are needed. The texture, color, and density of perennial ryegrass are very similar to those of Kentucky bluegrass. Perennial ryegrass is often utilized for winter overseeding on golf course fairways and teeboxes, athletic fields, and high profile home lawns. Perennial ryegrass is often confused with tall fescue and/or Kentucky bluegrass. However, Kentucky bluegrass has a boat-shaped leaf tip and distinctive light-colored lines on both sides of the midrib. Tall fescue has rough leaf blade margins whereas perennial ryegrass has smooth ones. Also, tall fescue has rolled vernation in the leaf bud and perennial ryegrass has folded vernation.

Presentations

Publications

Species Data

Seedhead/Flower

a spike, with flattened spikelets along each stem

Vernation type

leaves folded in the bud

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Ligule Type

membranous; collar-like to blunt, may be toothed near top, 0.02 - 0.06 inches (0.5 - 1.5 mm) long

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Growth Season/Life Cycle

cool season turf or perennial weed

Auricle type

rudimentary

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auricles
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Leaf blade tip shape

sharp-pointed; bright green, sharply creased, deeply ridged upper surface, lower surface smooth and glossy, edges slightly rough

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Leaf blade width

0.08 - 0.2 inches (2 - 5 mm) wide

Stolon Presence

absent

Rhizome Presence

absent

Collar Type

divided by midrib, not hairy, distinct

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