GRASS FAMILY. 391 



"Wheat has found its way into some districts of our country ; and is a 

 troublesome pest in cultivated grounds, when fully introduced, by 

 reason of the great tenacity of lite in its rhizomas, or creeping subter- 

 ranean stems. In some localities this may afford an acceptable pastur- 



FIG. 264. Couch- or Quitch-Grass (Triticum repens). 



