CONTENTS 



PAGE. 



Chapter I. Introductory 9 21 



Chapter II. The Round of Plant Life 22114 



Section 1 The Behavior of Seeds toward Water 22 24 



" 2 Germination 24 32 



" 3 The Plantlet 3248 



4 The Inner Structure of the Plantlet... 48 56 

 " 5 The Water of Plants and its Move- 

 ments 57 64 



" 6 The Root and the Soil 64 77 



" 7 The Stem 78 80 



" 8 The Leaves 81 84 



" 9 The Buds 84 93 



" 10 The Flower 93101 



" 11 The Fruit and the Seed 101104 



12 The Gathering and Storing of Seeds.. 104109 

 " 13 The Decline of Growth and the Rest 



Period 109114 



Chapter III. The Plant as Affected by Unfavorable 



Environment 115 180 



Section 1 The Plant as Affected by Unfavorable 



Temperature 115132 



A By Excessive Heat 115118 



B By Excessive Cold 118124 



Section 2 Methods of Averting Injury by Cold.. 124132 

 A During the Dormant Period 124126 

 B During the Growing Period 126122 

 Section 3 The Plant as Affected by Unfavorable 



Water Supply 133140 



A By Excessive Water 133137 



B By Insufficient Water 137140 



