PLATE 12 
A. —A saltbush, showing the large size which it attains under favorable con¬ 
ditions. Mecca, Calif., September 16, 1914 
B. —A rank dense growth of arrowweed in Coachella Valley. Photographed 
near sample 15. (See Table I.) Indio, Calif., September 15, 1914. 
