CONTENTS 



CHAPTER 



I. INTRODUCTION j 



II. THALLOPHYTES : ALG.E 4 



III. THE EVOLUTION OF SEX .... 12 



IV. THE GREAT GROUPS OF ALG^ ... 17 



V. THALLOPHYTES: FUNGI .... 48 



VI. THE FOOD OF PLANTS 83 



VII. BRYOPHYTES 93 



VIII. THE GREAT GROUPS OF BRYOPHYTES 109 



IX. PTERIDOPHYTES 128 



X. THE GREAT GROUPS OF PTERIDOPHYTES .... 155 



XI. SPERMATOPHYTES : GYMNOSPERMS 171 



XII. SPERMATOPHYTES: ANGIOSPERMS 195 



XIII. THE FLOWER 218 



XIV. MONOCOTYLEDONS AND DICOTYLEDONS 232 



XV. DIFFERENTIATION OF TISSUES 280 



XVI. PLANT PHYSIOLOGY 297 



XVII. PLANT ECOLOGY 311 



GLOSSARY 329 



INDEX . ,337 



