CONTENTS 



CHAP. PAGE 



I. THE LIFE-HISTORY OF A FERN i 



II. THE HABIT AND THE HABITAT OF FERNS ... 26 



III. A THEORETICAL BASIS FOR THE SYSTEMATIC TREAT- 

 MENT OF FERNS 52 



IV. MORPHOLOGICAL ANALYSIS OF THE SHOOT-SYSTEM 



OF FERNS 66 



V. LEAF-ARCHITECTURE OF FERNS 81 



VI. CELLULAR CONSTRUCTION 105 



VIL THE VASCULAR SYSTEM OF THE AXIS . . . .120 



(A) The Protostele and its immediate derivatives . . .120 



VIII. THE VASCULAR SYSTEM OF THE AXIS .... 140 



(B) The Stelar Structure of the Leptosporangiate Ferns . 140 



IX. THE VASCULAR SYSTEM OF THE LEAF . . . .160 



X. SIZE A FACTOR IN STELAR MORPHOLOGY . . . 177 



XI. DERMAL AND OTHER NON-VASCULAR TISSUES . . 195 



XII. THE SPORE-PRODUCING ORGANS 206 



(A) The Sorus 206 



XIII. THE SPORE-PRODUCING ORGANS 242 



(B) The Sporangium 242 



XIV. THE GAMETOPHYTE, AND SEXUAL ORGANS . . .273 

 XV. THE EMBRYO 298 



XVI. ABNORMALITIES OF THE LIFE-CYCLE .... 318 



XVII. ORGANOGRAPHIC COMPARISON OF THE FILICALES 



WITH OTHER PLANTS 336 



POSTSCRIPT TO VOLUME I 348 



INDEX 349 



View in the Kibble House, Botanic Garden, Glasgow Frontispiece 



