PLATE 12 



General view of native vegetation near Mandan, N. Dak., showing composition and 

 density. The following species are evident in the photograph: Psoralea argophylla, 

 Echinacea angustifolia, Artemisia frigida, Bouteloua gracilis, Stipa comata, S. viridula, 

 and Ratibida columnaris. 



