CONTENTS. 



PART I. GENERAL. 



CHAPTER PAGE 



I. THE LEAF 3 



II. FORM AND COMPOSITION OF LEAVES ... 14 



III. GENERAL CHARACTERS OF VENATION, SURFACE AND 



TEXTURE OF LEAVES 32 



IV. DIVIDED AND COMPOUND LEAVES .... 38 



V. CHARACTERS OF THE VENATION IN DETAIL . . 46 



VI. CELLS AND CELLULAR STRUCTURE .... 67 



VII. THE STRUCTURE OF THE LEAF .... 79 



VIII. THE VASCULAR SYSTEM AND VENATION . . 83 



IX. THE MESOPHYLL 86 



X. THE EPIDERMIS AND STOMATA .... 97 

 XL PHYSIOLOGY OF THE LEAF MOVEMENTS AND POSI- 

 TIONS OF LEAVES 108 



XII. PHYSIOLOGY OF THE LEAF (continued) TRANSPIRA- 



TION AND RESPIRATION 122 



XIII. PHYSIOLOGY OF THE LEAF (continued} CARBON 



ASSIMILATION OR PHOTOSYNTHESIS . . .128 



XIV. NON-TYPICAL LEAVES AND THEIR SUBSIDIARY 



FUNCTIONS 138 



