10 CONTENTS 



CHAPTER XIII 

 Soil 144 



CHAPTER XIV 

 Watek 159 



CHAPTER XV 

 Growth Habits of Plants 1G7 



CHAPTER XVI 

 Plant Communities 180 



CHAPTER XVII 

 The Structure and Classification of Plant Communities . . . 192 



CHAPTER XVIII 

 Plant Succession 203 



CHAPTER XIX 

 Typical Examples of Plant Succession 220 



CHAPTER XX 

 Phenology 232 



CHAPTER XXI 

 The Distribution of Plant Communities in the United States . . 238 



CHAPTER XXII 

 Applied Ecology 255 



Appendix 263 



