SHREVE 



Plate 5 



A. Desert Slopes near mouth of Pirn a Canon. In foreground, from the left are Parkinsonia microphylla, 

 Simmondsia calif arnica, Carnegiea gigantea, Opuntia tourney i, and Lycium berlandieri. 



B. Rocky Desert Slopes in same vicinity as A. Against the sky are FOI/I/U/I ri/i splendens, Prosopis 

 velutina, and Momitsia pallid a; in foreground Spfiirralcea pedata, Lippia wn-jhtii, and Opuntia 

 engdmanni. 



