Lolium
ryegrass
4 species
1 subspecies and varieties
1 subspecies and varieties
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Lolium multiflorum – annual ryegrass, Italian ryegrass, perennial ryegrass
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Roadsides and waste ground.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Biennial, Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Roadsides and waste ground.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Biennial, Perennial
Lolium perenne – English ryegrass, perennial ryegrass
Distribution: Occurring on both sides of the Cascades crest; Alaska to California, east to the Atlantic Coast.
Habitat: Old fields, roadsides, and waste places.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest; Alaska to California, east to the Atlantic Coast.
Habitat: Old fields, roadsides, and waste places.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
Lolium persicum – Persian ryegrass
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Washington, east across the northern U.S. and Canada to the Atlantic Coast.
Habitat: Disturbed areas at low elevations.
Origin: Introduced from Eurasia
Flowers: April-June
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Washington, east across the northern U.S. and Canada to the Atlantic Coast.
Habitat: Disturbed areas at low elevations.
Origin: Introduced from Eurasia
Flowers: April-June
Growth Duration: Perennial
Lolium temulentum – darnel, tare
Distribution: Occurring chiefly west of the Cascades crest in Washington; Yukon Territory to California, east across North America to the Atlantic.
Habitat: Disturbed ground, pastures, and roadsides.
Origin: Introduced from the Mediterranean
Flowers: May-June
Growth Duration: Annual
Distribution: Occurring chiefly west of the Cascades crest in Washington; Yukon Territory to California, east across North America to the Atlantic.
Habitat: Disturbed ground, pastures, and roadsides.
Origin: Introduced from the Mediterranean
Flowers: May-June
Growth Duration: Annual
• ssp. temulentum – darnel
