THE SINGLE-LEAF PINYON 



Usually a low sprawling, much-branched tree of pic- 

 turesque form and from 15 to 25 feet high. Occasional 

 trees may reach a height of 40 feet, rising like mag- 

 nificent oaks, gnarled, robust and strong and with broad 

 crowns. 



A characteristic desert mountain plant society is shown 

 in the foreground consisting of the Mohave Yucca, 

 Parry's Zizyphus, Ayenia, Scrub Juniper and Deer-horn 

 Cactus. 



