Bui. 196, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate IV. 



Fig. 1 .— Rows of Agropyron cristatum. 



Fig. 2.— Rows of Agropyron tenerum. 



AGROPYRON IN THE GRASS NURSERY AT THE BELLEFOURCHE 

 EXPERIMENT FARM, SOUTH DAKOTA. 



