TABLE OF CONTENTS xi 



CHAPTER XIV. 



PAGE 



SOME SPECIAL ASPECTS OF NUTRITION OF PLANTS 117 



Sources of plant food 117 



Nitrification 119 



Fixation of nitrogen 120 



CHAPTER XV. 



NUTRITION OF PARASITES AND SAPROPHYTES 126 



Nutrition of parasites 127 



Nutrition of saprophytes 130 



Bacteria 135 



CHAPTER XVI. 



FLOWERS, THEIR STRUCTURE AND KINDS 140 



I. Flowers of dicotyledonous plants 142 



The buttercup 142 



The evening primrose 145 



Butter and eggs 148 



The sweet pea 150 



The sunflower 153 



CHAPTER XVII. 



FLOWERS, THEIR STRUCTURE AND KINDS (concluded) 158 



II. Flowers of monocotyledonous plants 158 



The Indian corn 158 



Jack-in-the-Pulpit, Indian turnip 163 



Gladiolus 165 



CHAPTER XVIII. 



METHODS OF POLLINATION . 167 



Close pollination 169 



Cross-pollination by the wind 171 



Cross-pollination by insects 172 



CHAPTER XIX. 



FERTILIZATION AND DEVELOPMENT OF THE SEED . 182 



