CONTENTS 



Preface v 



Introduction ix 



Equipment and Methods xiii 



PART I.— PLANT LIFE 



CHAPTER 



I. Seeds and Seedlings 3 



II. Roots 18 



III. Stems and Buds 31 



IV. Leaves 45 



V. The Flower 54 



VI. Reproduction 74 



VII. Fruits and Seeds 83 



VIII. Anatomy op Stems, Roots, and Leaves 93 



IX. Chemical Composition of the Plant 105 



X. Plant Foods and Plant Growth Ill 



XI. The Gymnosperms 121 



XII. Ecological Relations 126 



XIII. Forestry 134 



XIV. Plant Diseases 139 



XV. Plant Breeding 147 



XVI. Weeds 150 



XVII. Pteridophytes 158 



XVIII. Bryophytbs 164 



XIX. THALLOPHYTiES 169 



XX. Bacteria 177 



PART II.— MOST IMPORTANT FAMILIES OF ECONOMIC 

 PLANTS, WITH SPECIAL EXERCISES 



XXI. Important Families of Plants 183 



Mustard — Crucifer^e 185 



Violet— VioLACE^ 189 



Mallow — Malvaceae .• 191 



Sterculia — Sterculiace^ 193 



Flax — Linace.e 193 



Rue — RuTACEiE 195 



ix 



