PLATE 1 
A. —General view of the bad lands northwest of Indio, Calif. The vegetation, 
largely annuals, is very sparse. Indio, Calif., Apr. 20,1913. 
B. —Yucca and cactus association. Detail showing the rough and stony char¬ 
acter of the land usually occupied by this association, and also the variety of plant 
forms including Ferocactus acanthodes (Lemaire.) Britton & Rose, Opuntia bigelovii 
Engelm., and Encelia farinosa A. Gray. Near Palm Canyon, Calif., March 8, 
1915. 
(802) 
