Leymus multicaulis, also known as manystem wild rye or manystem lyme grass, is a species of the genus Leymus. The species name of manystem wild rye, multicaulis, suggests the “many stems” of the species. Leymus multicaulis is considered a type of grass. Manystem wild rye has only one cotyledon in each of its seeds. The xylem and phloem within the roots are arranged in a ring pattern. The vascular bundles are scattered throughout the stem. These traits make Leymus multicaulis a monocot. Leymus multicaulis is a flowering plant, or angiosperm.