VI CONTENTS 



Part II. The Marattiales. 



I. The Gametophyte iig-134 



The ProthaWmm o( Kaulfussia . . . . . 122 



The Prothallium of Z)an«a .... 124 



The Endophyte of the Marattiaceae 127 



The Sexual Organs 128 



The Antheridium 128 



Spermatogenesis 129 



The Archegonium 130 



FertiHzation 134 



II. The Embryo . 135-159 



The Embryo of MaraHia . 136 



The Embryo of Jngiopteris 139 



The Embryo of .£^a«//ujjia 141 



The Embryo of Z)an(Ea 142 



The Anatomy and Histology of the Young Sporophyte . . . . '. . .145 



The Cotyledon .... . 146 



The Stem of the Young Sporophyte 153 



The Root 155 



The Second Leaf 156 



III. The Older Sporophyte 160-208 



The Development of the Vascular System in Dancea . . . .160 



The Adult Sporophyte oi Dancda -175 



The Anatomy of the Leaf 177 



The Apical Growth of the Roots 178 



The Sporophyte of Kaulfussia 179 



The Sporophyte of Marattia 188 



The Adult Sporophyte of Marfl«/a. . . 193 



The Sporophyte of Angiopteris 195 



The Adult Sporophyte of Angiopteris 200 



Archangiopteris 203 



Macroglossum . 204 



Tissues of the Marattiaceae 204 



The Sporophyll of the Marattiaceae . 204 



The Sporangium of the Marattiaceae 205 



Part III. 



The Origin and Relationships of the Eusporangiatae 209 



Conclusion 217 



Bibliography 219 



List of Plates . 223 



Index ... 225 



