CONTENTS OF PART II 



PACK 



PKEFACK vii 



CHAPTER I 



THE VASCULAR CRYPTOGAMS . 1 



Type IV 



SELAGINELLA KRAUSSIANA ..... 1 

 I. External Characters 



A. Vegetative Organs . . . . .2 



B. Reproductive Organs ..... 6 



II. Internal Characters of the Vegetative Organs , . 7 



a. The Stem ...... 8 



1. The Leaves . . . . .12 



c. The Rhizophores and Roots ... 13 



d. Growing-Points and Mode of Branching 



a. The Stem . . . . .14 



/3. Rhizophores and Roots . , .14 



III. Reproduction and Life-History 



a. The Sporangia and Spores , . .16 



b. Germination of the Microspores . . .20 



c. Germination of the Megaspores . . .24 



d. Fertilisation and Embryology . 28 

 Comparison between Selaginella and the Gymnosperms . 31 



ix 



