CONTENTS. 



CHAPTER PAOB 



I. — Introduction 1 



II. — Foliage leaves : The light-relation ... 6 



III. — Foliage leaves : Function, structure, and protection 86 



IV.— Shoots 53 



V.— Roots 89 



VI. — Reproductive organs 109 



VII. — Flowers and insects ....... 123 



VIII. — An individual plant in all of its relations . . 138 



IX. — The struggle for existence 142 



X. — The NCTRmoN of plants 149 



XI. — Plant associations: Ecological factors . . . 162 



XII. — Hydrophyte associations 170 



XIII. — Xerophyte associations 193 



XIV. — Mesophyte associations 233 



Index 259 



