CONTENTS. 



CHAPTER. PAGE. 



I. — Introduction 1 



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

 III. — Foliage leaves : Fuxction, stbuotitre, and protection 28 

 IV. — Shoots . . . .53 



v. — Roots . h9 



VI. — Reproductive organs ... . 109 



VII. — Flowers and insects . . 12;:! 



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



IX. — The STnuGuLE for existence 142 



X, — The nutrition of plants 149 



XI. — Plant societies : Ecological factors . 162 



XII. — Hydrophyte societies .... 170 



XIII. — Xerophyte societies ....... 193 



XIA'. — Mesophyte societies . .... 230 



XV. — Halophyte societies . . ... 249 



Index 257 



