CONTENTS 



CHAPTER I 



PAOE 



Intkoductoey — Asexual Plants . . . . i 



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 Aechegoniates : I. Beyophytes — Liver wo ets and Mosses - 120 



CHAPTER VI 



The Aechegoniates: II. Ptebidophytbs — Feens, Hoksetails, 

 and Club-Mosses ...... 14,2 



CHAPTER VII 

 Phaneeogamia: Floweeing Plants - 171 



CHAPTER VIII 

 Fossil Plants - ..... 219 



vii 



