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

Elymus, genus Elymus - tall tufted perennial grasses (such as lyme grass or wild rye)

Elymus condensatus, giant ryegrass, Leymus condensatus - stout perennial grass of western North America

Elymus arenarius, European dune grass, Leymus arenaria, sea lyme grass - a dune grass of the Pacific seacoast used as a sand binder