Bui. 367, U. S. Dept. of Agriculture. 



Plate III. 



FiQ. 1.— The Crowfoot Grama Association in a Typical Form on the Santa 

 Rita Range Reserve. 



.JIKb*'*'- 



Fig. 2.— a Patch of Heteropogon contortus on the Reserve, Showing the 

 Habit, Size, and Density of This Grass as It Grows in the Crowfoot Grama 

 Association. 



