Breaking down the rye grasses | Illinois Extension | UIUC
Canada Wild Rye (Elymus canadensis) - Mississippi National River & Recreation Area (U.S. National Park Service)
Ray's Perennial Ryegrass
A manual of weeds : with descriptions of all the most pernicious and troublesome plants in the United States and Canada, their habits of growth and distribution, with methods of control .
Mandan Wildrye Grass, Grains | Urban Farmer
Canada Wild Rye (Elymus canadensis glaucifolius)
Elymus canadensis (Canada Wild Rye)
Canada wild rye | The Morton Arboretum
Elymus canadensis (Canada wild rye) | Native Plants of North America