730 
Journal of Agricultural Research 
Voi. XXVIII, No. 8 
Narrowleaf saltbush covers small tracts in the desert sage area especially 
where the soil is shallow. Seep weed and Atriplex fasciculata S. Wats, cover low 
flat places where the water collects after a rain and the salt content is high. 
Fig. 3.—Map showing the distribution of the important plant communities in a small area in the Gila 
Valley. This map gives an idea of the relative importance of the different types. Gila Valley, Ariz , 
1915. 
DETAILED DESCRIPTION OF PLANT COMMUNITIES 
Detailed description of the plant communities together with discussions of the 
soil conditions found in typical areas of those communities are given in the 
following pages. 
