Bui. 67, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate II. 



Fig. 1.— Live-oak Belt, Upper Foothills. Eastern Slope of Huachuca Moun- 

 tains, First of July, 1903, Before the Rainy Season Began; Last Year's 

 Crop of Grass all Eaten off. 



Fig. 2.— Upper Foothills, Northern Slope, Santa Rita Mountains, Just Below 

 THE Oak Belt, Showing Panicum machnanthum. Grama, and Mesquite at the 

 Close of the Rainy Season. 



CONTRAST BETWEEN DRY AND WET SEASONS IN FOOTHILLS RANGE. 



