Bui. 4. Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate V. 





m^i 





Fig. 1.— Operations in Range Improvement near Tucson, Ariz., January, 1901. 



iG. 2.— Range Reserve Tract near Tucson, Ariz., showing a typical Creosote- 

 Bush (Larrea mexicana) locality. 



i 



