buffalo grass

from The Century Dictionary.

• noun A common name for several low grasses very prevalent upon the plains east of the Rocky Mountains, including Buchloë dactyloides, a diœcious species, and Bouteloua oligostachya, with others of the same genus.

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

• noun Bouteloua dactyloides.
• noun Hierochloe odorata, family Poaceae, sweetgrass.
• noun Anthoxanthum odoratum, sweet vernal grass, vanilla grass.
• noun Stenotaphrum secundatum, Saint Augustine grass.
• noun Panicum maximum, Guinea grass.

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

• noun short grass growing on dry plains of central United States (where buffalo roam)
• noun low mat-forming grass of southern United States and tropical America; grown as a lawn grass