SHREVE 



Plate 36 



A. Santa Catalinas viewed from north, showing grassy plains at elevation of 4,200 feet in the vicinity of 



Oracle. At right Prosopis velutina, at left Yucca alata. 



B. At north base of Santa Catalinas looking toward San Pedro River, at 4,500 feet. At right Quercus emoryi 



and Nolina microcarpa, at left Yucca alata. 



