CONTENTS 



CHAPTER PAGE 



I. LIFE HISTORY OF A FERN ' i 



II. LIFE HISTORY OF A FERN (Concluded) 20 



III. FUNDAMENTAL PRINCIPLES 31 



IV. HEREDITY '...." 45 



V. EXPERIMENTAL STUDY OF HEREDITY 55 



VI. EVOLUTION . . 79 



VII. DARWINISM go 



VIII. EXPERIMENTAL EVOLUTION 101 



IX. THE EVOLUTION O,F PLANTS 1 24 



X. GEOGRAPHICAL DISTRIBUTION 139 



XI. PALEOBOTANY 183 



XII. THE EVOLUTION OF PLANTS (Concluded) .201 



XIII. THE GREAT GROUPS OF PLANTS 243 



BIBLIOGRAPHY 252 



INDEX 257 



