Fig. 83. — Aspect effects in Colorado and Nepal. A, Colorado, U.S.A.: the 

 relatively damp and cool north-facing slope (on left) is covered by a stabilized 

 forest of Douglas Fir, whereas the south-facing slope supports mainly dry Oak 

 scrub and scattered Ponderosa Pines. (Phot. G. E. Nichols. By permission 

 from Plant Ecology, by Weaver & Clements, copyright date 1938, McGraw-Hill 

 Book Co.) B, Jumla, West Nepal, c. 3048 metres (10,000 feet) in the Himalayas: 

 the north-facing slope (on left) is forested with Abies spectobilis and Betula utilis, 

 and, lower down, some Pintis ivallichiana , whereas the dry and sunny south- 

 facing slope supports chiefly herbs and Grasses, with some scattered low Jfiinipenis 

 bushes. (Phot. O. Polunin.) 



