168 



S. B. PARISH 



that of the dry ridges and hills. Though arid the canon soils 

 are relatively moister than those of the hills and the shelter of 

 their cliffs and steep sides affords a varied environment con- 

 ducive to a diversified plant life. 



Fig. 3. Alpine slopes of San Gorgpnio Peak, with open forest of limber pine 



The limits of the Transition Zone are approximately between 

 5000 and 7000 feet altitude. They are occupied by a forest of 



