161 



Grazing results in the destruction of the larger species of 

 bunch-formers, leaving Panicum cognatum and the undeter- 

 mined Panicum, Paspal urn setaceum, and Bouteloua hirsuta as the 

 predominant grasses. The other species, such as Eragrostis 

 trichodes and Stipa spartea, so prominent in the original vege- 



TABLE II. PASTURED BUNCH-GRASS. 

 (Not pastured for two years preceding count. ) 



tation, are present only rarely and in scattered bunches. The 



*See p. 159. 



