THE DESERT 



467 



soil in which it grows. Because the rains are infrequent 

 the only water available to the plant is to be found near 



Fig. 133. — The Utah Desert (eastern Utah) with scattered desert 

 shrubs in alkahne soil in the flood-plain which forms the foreground. 

 The cliffs are practically devoid of plant life. (Vestal.) 



Fig. 134. — Succulent Vegetation of the southern Arizona desert. 

 The giant cactus or Sahuaro. (Shreve.) 



the surface immediately after rain. As we have seen in 

 the chapter on Tropisms and Correlations in Plants 



