PLATE 14 



A. Family of Pachylophus caespitosus, Minnehaha, Colorado. 



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fflr^^j'!''^--'' v.7^?r. 



B. Colony of Dondia a,nd Atriplex in a depression, bed of a former salt lake, Hazen, Nev. 



C. Tumbleweed,;.<Soisoia, on the Great Plains, Akron, Colorado. 



