C5 



CONTENTS 



PAGE 



I. INTRODUCTORY . . 3 



II. GROWTH OF THE SHOOT 5 



III. THE LEAF 7 



IV. PHOTOSYNTHESIS 9 



t V. r ^TRANSPIRATION ii 



[ VlV ORGANIZATION OF THE HERBACEOUS STEM . . 13 



'Vill-BT'Eiyr MECHANISM 15 



VIII. THE WOODY STEM 17 



IX. THE ROOT 19 



X. ROOT MECHANISM 21 



XI. THE TRANSPIRATION CURRENT 23 



XII. PERENNATION .25 



GENERAL LITERATURE . . .... 27 



