Leymus cinereus (syn. Elymus cinereus) is a species of wild rye known by the common names basin wild rye, Great Basin wild rye, and Great Basin lyme grass. It is a common native grass of western North America, including western Canada and the United States from California to South Dakota and Minnesota. It grows in many types of habitat, including grassland and prairie, forests, scrub, chaparral, and sagebrush.