Bui. 201, U. S. Dept, of Agriculture. 



Plate IV. 



Fig. 1.— Andropogon Torreyanus from Seed Sown the Previous Season above 

 a Low Earthen Dam, Thrown up on Desert Mesas Near Tucson, Ariz. 



Fig. 



2.— Native Pasture Lands in the Foothills, Fresno County, Cal., Showing 

 Introduced Brome-Grasses That Are Almost Entirely Weedy. 



