334 



ECOLOG y. 



organs to serve such a variety of purpose under such diametri- 

 cally opposed environmental conditions. 



500. Refoliation of bare forests in spring. — There is a 



Fig. 275. 

 Austrian pine, showing young growth of branches in early spring. 



certain charm watching the refoliation of the bare forests, when 

 the cool gray and brown tints are slowly succeeded by the light 



