Genus Elymus is a type of perennial grass found in temperate regions around the world. It is commonly known as wild rye or Lyme grass. This grass species has several synonyms, including Elymus canadensis, Elymus caninus, Elymus europaeus, Elymus giganteus, and Elymus trachycaulus. Other common names for genus Elymus are blue wild rye, tall wheatgrass, and giant wild rye. The grass is commonly used for erosion control, reclamation of disturbed land, and as forage for livestock. Its seeds are also edible and can be ground into flour and used for baking. With its numerous benefits, genus Elymus has become a valuable grass species globally.