lyme grass

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) A coarse perennial grass of several species of Elymus, esp. Elymus Canadensis, and the European Elymus arenarius.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Leymus arenarius, a coarse perennial grass.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a grass of the genus Elymus