CONTENTS xi 



II. Internal Structure and Development of the Sporophyte 



1. Vegetative Organs ^AGE 



a. The Stem ...... 83 



b. The Leaves ..... 90 



c. The Roots . . . . . 90 



d. Growing Points and Branching . . .92 



2. Reproductive Organs of the Sporophyte . . 96 



III. Development and Structure of the Sexual Generation 

 (Oophyte) 



1. The Prothallus . . . . .100 



2. The Sexual Organs 



a. The Antlieridia . . . . .101 



*. The Archegonia . . . . .102 



3. The Embryo . . . . . .304 



Summary ....... 106 



CHAPTER II 



THE BRYOPHYTA . . .109 



A. THE LIVERWOKTS 



Type VII 



PELLIA EPIPHYLLA 



1. The Thallus ...... 110 



2. The Sexual Organs 



a. The Antheridia . . . . . .114 



b. The Archegonia .. . , . .116 



c. Fertilisation . . . . .119 



3. The Sporogonium or Fruit 



a. External Characters . . . .123 



b. Development . . . . .121 

 Summary . . . . , . .125 



