CONTENTS OF PART II 



PACK 



PREFACR vii 



CHAPTER I 



THE VASCULAR CRYPTOGAMS . 1 



Type IV 



SELAGINELLA KKAUSSIANA ..... 1 

 I. External Characters 



A. Yegetative Organs . . . . .2 



B. Reproductive Organs ..... 6 



II, Internal Characters of the Vegetative Organs , . 7 



a. The Stem ...... 8 



b. The Leaves . . . . .12 



c. The Rhizophores and Roots . . .13 



d. Growing-Points and Mode of Branching 



a. The Stem ..... 14 

 P. Rhizophores and Roots . .14 



III. Reproduction and Life-History 



a. The Sporangia and Spores . . .16 



6. Germination of the Microspores . . .20 



c. Germination of the Megaspores . . .24 



d. Fertilisation and Embryology . . .28 

 Comparison between Selaginella and the Gymnosperms . 31 



ix 



