Bui. 4 Bureau of Plant industry, U. S Dep'. of Agriculture. 



PuATE I. 



FiG. 



-Railroad Right of Way near Benson. Ariz., showing the Condition of 

 THE Range under Protection. 



Fig. 2.— WRIGHT'S Saccaton 'Sporobolus wrightip. 



The Santa Cruz bottoms near Tucson. Ariz., are said to have been covered with this grass. 



