Elymus Canadensis

from WordNet (r) 3.0 (2006)

Elymus canadensis
    n 1: North American wild rye [syn: {Canada wild rye}, {Elymus
         canadensis}]

from The Collaborative International Dictionary of English v.0.48

Lyme grass \Lyme" grass`\n. (Bot.)
   A coarse perennial grass of several species of {Elymus}, esp.
   {Elymus Canadensis}, and the European {Elymus arenarius}.
   [1913 Webster]