CONTENTS 



Preface . PAG * 



Preface to First Edition . ; x 



CHAPTER I 

 Introduction . x 



CHAPTER II 



EQUISETALES VEGETATIVE STRUCTURE 



Calamitesj Arthrodendron j Calamodendron ; Protocalamites 



1. The Calamarieae . . 15 



2. The Stem of Calamites 1 9 



3. Branching. . 31 



4. Other Types of Stem 33 



5. The Leaves . 38 



6. The Roots . . 41 



7. The Medullary Casts ... 46 



CHAPTER III 



EQUISETALES FRUCTIFICATIONS AND CLASSIFICATION 



Calamostachys ; Palaeostachya ; Cingulariaj Archaeocalamites j 

 Macrostachya ; Classification of Calamarieae; Mesozoic 

 Equisetales 



1. The Fructifications ... 49 



xiii 



