grass - narrow-leaved green herbage: grown as lawns; used as pasture for grazing animals; cut and dried as hay

genus Lolium, Lolium - darnel; ryegrass

English ryegrass, Lolium perenne, perennial ryegrass - European perennial grass widely cultivated for pasture and hay and as a lawn grass

Italian rye, Italian ryegrass, Lolium multiflorum - European grass much used for hay and in United States also for turf and green manure

bearded darnel, cheat, darnel, Lolium temulentum, tare - weedy annual grass often occurs in grainfields and other cultivated land; seeds sometimes considered poisonous