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 Antheridia . . . . .101 



b. The Archegonia . . . . .102 



3. The Embryo . . . . . .104 



Summary ....... 106 



CHAPTER II 



THE BRYOPHYTA . . .109 



A. THE LIVERWORTS 



Type VII 



PELLIA EPIPHYLLA 



1. TheThallus ...... 110 



2. The Sexual Organs 



a. The Antheridia . . . . .114 



6. The Archegonia . . . . .116 



c. Fertilisation . . . . .119 



3. The Sporogonium or Fruit 



a. External Characters . . . .120 



b. Development . . . . .121 

 Summary ....... 125 



