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ryegrass
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perennial ryegrass
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perennial ryegrass
perennial ryegrass Perennial ryegrass (Lolium perenne).

ryegrass

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Articles from Britannica Encyclopedias for elementary and high school students.
Also known as: Lolium
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ryegrass, (genus Lolium), genus of about 10 species of grass in the family Poaceae. A number of species are grown as forage and lawn grasses in temperate Eurasia and Africa, and both perennial ryegrass (Lolium perenne) and annual ryegrass (L. multiflorum) are important constituents of pasture and lawn-seed mixtures used around the world. The plants are unrelated to cereal rye (Secale cereale). Ryegrasses can be annuals or perennials. The tufted plants reach about 0.3 to 1 metre (1 to 3.3 feet) tall and have tough dark green leaves. The flower spikelets grow in the angles of a zigzag rachis (flower ...(100 of 170 words)

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