PLATE 24 



Fig. 1. Packed saud situation in sagebrush habitat, three miles east of 

 Wallula, June 13, 1914. The plants are common sagebrush (Artemisia trideii- 

 tnta) and rabbit brush (Chrysothamnus viscidiflorus and Chrysothamnus nauseosus 

 graveolens) . 



Fig. 2. Drifting sand situation in sagebrush habitat, three miles east of 

 Wallula, June 13, 1914. The plants are common sagebrush and rabbit brush 

 and a few individuals of the hop sage ( Grayia spinosa). In the distance are 

 the bimchgrass-covered hills south of the Walla Walla River. 



[344] 



