272 



J. E. WEAVER 



Fig. 2. A small area in the salt basin showing the zonation of Dondia depressa 

 (darker border adjoining bare areas), Atriplex hastata (upper right portion of 

 the figure especially), Distichlis spicata and prairie (just in front of and behind 

 the man in the figure respectively). The numbers indicate the locations of 

 permanent quadrats. 



Fig. 3. Salt incrustations on Dondia depressa, October, 1917. 



