CONTENTS 



Page 



Chapter I. — Introductory 9 — • 21 



Chapter II.— The Round of Plant Life 22—118 



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 Movements 57 — 65 



6— The Eoot and the Soil 65— 79 



7— The Stem 79— 82 



8— The Leaves 82—85 



" 9 — The Buds 86— 95 



10— The Flower 95—103 



11— The Fruit and the Seed 103—106 



12 — The Gathering and Storing of Seeds 106—111 



" 13 — The Decline of Growth and the Rest Pe- 

 riod 111—117 



Chapter III. — The Plants as Affected by Unfavorable 



Environment 118 — 188 



Section 1 — The Plant as AfEected by Unfavorable 



Temperature 118 — 136 



A— By Excessive Heat 118—121 



B— By Excessive Cold 121—127 



Section 2 — Methods of Averting Injury by Cold 127 — 136 



A — During the Dormant Period 127 — 129 



B — During the Growing Period 129 — 136 



Section 3 — The Plant as AfEected by Unfavorable 



Water Supply 137—144 



A — By Excessive Water 137 — ■141 



B— By Insufficient Water 142—144 



