SHREVE 



Plate 25 



T* : -.; 



A. Looking toward south face of Mount Lemmon from crest of Marshall Gulch, near site of S, 000-foot 

 climatological station. Pinus arizonica and scrub of Quercus reticulata. 



B. Looking southwest into Marshall Gulch. The open area in the forest is a thicket of Populus tremuloides. 



