CONTENTS 



PAGE. 



Chapter I. Introductory 9 21 



Chapter II. The Round of Plant Life 22118 



Section 1 The Behavior of Seeds toward Water. 22 24 



2 Germination 24 32 



3 The Plantlet 32 48 



4 The Inner Structure of the Plantlet. . 48 56 

 " 5 The Water of Plants and its Move- 

 ments 57 65 



6 The Root and the Soil 65 79 



7 The Stem 7982 



8 The Leaves 82 85 



9 The Buds 86 95 



10 The Flower 95103 



11 The Fruit and the Seed 103106 



12 The Gathering and Storing of Seeds.. 106111 

 13 The Decline of Growth and the Rest 



Period 111117 



Chapter III. The Plants as Affected by Unfavor- 

 able Environment 118 188 



Section 1 The Plant as Affected by Unfavorable 



Temperature 118 136 



A By Excessive Heat 118121 



B By Excessive Cold 121127 



Section 2 Methods of Averting Injury by Cold.. 127136 



A During the Dormant Period . . . 127129 



B During the Growing Period... 129 13G 

 Section 3 The Plant as Affected by Unfavorable 



Water Supply 137144 



A By Excessive Water 137141 



B By Insufficient Water 142 144 



