CONTENTS. 



Preface 



PART I: THE PLANT BODY. 



Introduction : The unit of structure 

 Chapter I. Single-celled plants and colonies 

 II. Linear and superficial aggregates 



III. The thallus of the higher alg^ . 



IV. The fungus body of hyphal elements 

 V. Liverworts and mosses 



VI. Fernworts and seed plants 



VII. The root .... 



VIII. The shoot .... 



IX. The stem .... 



X. The leaves .... 



17 

 26 



39 

 49 

 60 



65 



82 



117 



PART II : PHYSIOLOGY. 



Chapter XI. Introduction; The unit of function. . 143 

 XII. The maintenance of bodily form . . 147 



XIII. Nutrition 151 



XIV. Growth 178 



XV. The movements of plants .... 188 



PART III: REPRODUCTION. 



Chapter XVI. Introduction : Reproductive structures . 209 

 XVII. Vegetative reproduction .... 211 



XVIII. Sexual reproduction 26S 



ix 



