PLATE 13 



A. — View across area of Andropogon furcatus. This grass is closely grazed, as it is 

 greatly relished by cattle. Mandan, N. Dak., Nov. 2, 1917. 



B. — Close view of Arisiida longiseta bunches. All other vegetation has been re- 

 moved by cattle close to the bunches. Mandan, N. Dak., Nov. 2, 1917. 



