CLEMENTS 



Western Desert Scrub 



PLATE 30 



A. Cerens-Eiicelia in hiva ridge with Ldrnn below, Tucs>on, Arizona. 



B. Parkinsonia microphylla and Cereus giganleus on foothills of Tucson Mountaias, 



C. Fouquiera splendens consociation, Santa Rita Reser\'e. 



