

CONTENTS 



CHAPTER PAGE 



I. — INTRODUCTION 1 



II. — Thallophytes : Alg^: 4 



III. — The evolution of sex 12 



IV. — The great groups of Alg.e ... 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 



Isdex. 337 



