Genus Leymus, also known as wildrye, is a group of cool-season grasses that are native to Eurasia and North America. These grasses are typically tall and robust, with long, arching leaves that provide excellent forage for livestock and wildlife. Some synonyms for Genus Leymus are Elymus, Hordeum, and Secale. Elymus is the largest genus in the tribe Triticeae, which includes many other important pasture and forage grasses. Hordeum is the genus that includes barley, a staple crop in many parts of the world. Secale is the genus for rye, which is also a popular food crop and forage grass. Together, these synonyms underscore the importance of Genus Leymus in the world of agriculture and ecology.