32 THE STUDY OF PLANT COMMUNITIES ' Chapter II 



The kinds of plants, as to form and appearance, that can grow in 

 a climatic region are, therefore, determined by the overall climate. 

 The species within the general growth form may vary from place 

 to place or from one limit of the climatic area to another as de- 

 termined by local variations in some factors. Local habitats may 

 have such marked differences in growing conditions that not only 

 will species differ but even the growth form may not be that of 

 the climate of the region. 



GENERAL REFERENCES* 



J. Braun-Blanquet. Plant Sociology : The Study of Plant Communities. 



A. E W SCHIMPER. Plant Geography upon a Physiological Basis. 



E. Warming. O ecology of Plants. 



J. E. Weaver and E E. Clements. Plant Ecology. 



*See References Cited on page 362 and following for complete listings. 



