CONTENTS OF PART II 



PAGB 



PKEFAOK . vii 



CHAPTER I 



THE VASCULAR CRYPTOGAMS . 1 



Type IV 



SELAGINELLA KRATJSSIANA ..... 1 

 I. External Characters 



A. Vegetative Organs ..... 2 



B. Reproductive Organs ..... 6 



II. Internal Characters of the Vegetative Organs , . 7 



a. The Stem. ..... 8 



b. The Leaves ..... 12 



c. The Rbizophores and Roots . . .13 



d. Growing-Points and Mode of Branching 



a. The Stem ..... 14 

 ft. Rhizophores and Roots . . .14 



. III. Reproduction and Life-History 



a. The Sporangia and Spores . . .16 



I. Germination of the Microsporcs . . .20 



c. Germination of the Megaspores . . .24 



d. Fertilisation and Embryology . 28 

 Comparison between Selaginella and the Gymnosperms . 31 



ix 



