CONTENTS 



CHAPTER I 



PAGE 



Introductory — Asexual Plants ..... 1 



CHAPTER II 



The Development of Sex in Plants and a Study in Evolution - 28 



CHAPTER III 



Seaweeds - - - - -- - -69 



CHAPTER IV 



Fungi and Lichens - - - - - - 90 



CHAPTER V 

 The Archegoniates : I. Bryophytes — Liverworts and Mosses - 120 



CHAPTER VI 



The Archegoniates: II. Pteridophytes — Ferns, Horsetails, 

 and Club-Mosses ...... 142 



CHAPTER VII 



Phanerogamia: Flowering Plants - - - - 171 



CHAPTER VIII 

 Fossil Plants ....... 219 



vii 



