What is "elymus canadensis"

Lyme grass \Lyme" grass`\n. (Bot.) A coarse perennial grass of several species of Elymus, esp. Elymus Canadensis, and the European Elymus arenarius.

Elymus canadensis is a species of wild rye known by the common name Canada wild rye. This grass is native to much of North America, being most abundant in the central plains and Great Plains. It grows in a number of ecosystems, including riparian woodlands, many types of forest, lakeside sand dunes, and tallgrass prairie.