Bui. 22, Div. of Agrostology, U. S. Dept of AgricuKure. 



Plate I. 



Fig. 1. -Bunch Wheat Grass (Aqropyron diverqens), U. S. Grass Station at Walla 



Walla. Wash 



Fig. 2.- Bunch Wheat Grass (Natural Growth^ Oregon. 



From a iihotograjjh l)y A. B. Leckeuby. 



