6 
CONTENTS. 
PAGE 
Tracheids 45 
Sieve 45 
Protecting cells 46 
Epidermal cells 47 
Plant hairs 47 
Stomata 48 
Water pores 48 
Cork 50 
Lenticels 50 
Laticiferous tissue 50 
Secretion cells and reservoirs 61 
CHAPTER II: THE VEGETATIVE AND REPRO- 
DUCTIVE PARTS OF THE PLANT. 
A. Vegetative parts of the plant 62 
The root 52 
Modified roots 55 
Structure of the root 55 
Contraction of roots 58 
Abnormal structure of roots 59 
The stem 59 
Modified stems 60 
Structure of the stem 62 
The leaf 64 
Functions of the leaf 65 
Venation of leaves 66 
Forms of leaves . 66 
Compound leaves 67 
Structure of the leaf 68 
Phyllotaxy 69 
Modified leaves . 71 
Prefoliation 71 
B. Reproductive parts of the plant 72 
The flower 72 
Simple flowers 73 
Compound flowers 74 
Prefloration 75 
Anthotaxy 75 
Modifications of the flower 77 
Calyx and corolla 79 
Stamens 81 
Pistil 83 
