Bui. 25, Div. of Agrostology, U. S. Dept. of Agriculture. 



Plate VI. 



Fig. 1.— Blue Grama iBouteloua oligostachya', as grown in Grass Station at 



Walla Walla, Wash. 



From a photoj^raiili by A. K. Lt>c-kt'nt)y. 



Fig. 2.— Switch Grass iPanicum virgatum), as grown in the Grass Garden at 



Washington, D. C. 



From ;i photoifraph by C. L. Shear. 



