CONTENTS 



CHAPTER I 



INTRODUCTION 



PAGE 

 1 



CHAPTER II 

 THE CONDITIONS OF PLANT LIFE 



CHAPTER III 

 THE SIMPLEST FORMS OF LIFE 31 



CHAPTER IV 

 ALG* 48 



CHAPTER V 

 FUNGI 80 



CHAPTER VI 

 MOSSES AND LIVERWORTS (BRYOPHYTA) . . . .101 



CHAPTER VII 

 THE FERNS (PTERIDOPHYTA) 122 



CHAPTER VIII 



PTERIDOPHYTA (Concluded') . 



vii 



