Bui. 4 Bureau of Plant Industry, U. S. Dtpt of Agnculture. 



Plate III. 



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Fig. 1.— Tufted Plantain Plantago fastigiatai on the left. Blue Grama 



BOUTELOUA OLIGOSSTACHYA' ON THE RIGHT. 

 Both rigures from plant.^ growing near Tucson. Ariz. 



Fig. 2.— Alfilaria vErodium cicutarium , groa'n on the University Campus at 



Tucson, Ariz. 



