CONTENTS 



xni 



Section 52. Buds and branches 



A. Kinds of buds 



B. Overproduction of buds 

 Section 53. Accumulation in stems . 



A. Why not " storage " ? 



B. Substances accumulated 



C. Latex .... 

 Section 53 A. Forestry 



A. Importance of forests 



B. Aims of forestry . ■ . 



C. Forestry outside of forests 



PAGE 



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Section 54. 

 Section 55. 



Section 56. 



Section 57. 



Section 58- 



Section 59. 



CHAPTER SIX: LEAVES 



Introductory . . . . 



A. Use and beauty of leaves 



B. Points already noted 

 External characteristics 



A. Venation 



Shape .... 



Attachment and arrangement 



Leaf surfaces 



Leaf size and foliage area 

 Functions ... 



A. Transpiration 



General relation of water to the plant 



Respiration 



Photosynthesis .... 



Summary as to gaseous exchanges 

 Structure 

 A. Epidermis 



B. ' 

 C. 

 D. 

 E. 



B. 

 C. 

 D. 

 E. 



B. Stomates 



C. Mesophyll 



D. Veins 

 Protection 



A. The shedding of leaves and their autumnal colors 



B. Movements of leaves 



C. The edgewise position 

 Special forms of leaves . 



A. Needle-like leaves . 



B. Leaves as insect traps 



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