106 THE STUDY OF PLANT COMMUNITIES • Chapter V 









n 



FlG. 51. Flag-form trees in the Columbia River Gorge, Ore. (1-2) Storm- 

 pruned Douglas fir, deformed by breakage and killing due to glaze storms 

 and strong west winds of midwinter. (3-4) Wind-trained Douglas fir shaped 

 by long-continued pressure of strong west winds of late spring and summer.— 

 From Lawrence. 1 ' 32 



from large bodies of water and how transporting salt spray may 

 be of local significance. Wind plays a more direct role in trans- 

 porting pollen and in dissemination. 



