CONTENTS. XIX 



PAGE 



Thermotropism 394 



Assumption of Definite Form during Growth 394 



Amount of Force exerted during Growth 895 



CHAPTER XHI. 

 MOVEMENTS. 



Locomotion 397 



Movements of Chlorophyll Granules in Leaves 398 



Hygroscopic Movements 399 



Movements due to Changes in Structure during Ripening of Fruits . 400 



Revolving Movements, or Circumnutation 400 



Methods of Observation 401 



In Seedlings 403 



Of the Young Parts of Mature Plants . 406 



In Twining Plant* 405 



Modified Circumnutation 407 



rtvctitropic or Sleep Movements 409 



Of Cotyledons 411 



Of Floral Organs 412 



Times of Opening and Closing of Flowers 412 



Spontaneous or Autonomic Movements 413 



Telegraph Plant 413 



Cause of Autonomic Movements not fully known 414 



Sensitiveness 414 



Of Roots 416 



Of Stems and Branches *17 



Of Tendrils 417 



OfPetioles 4 



Of Leaf-blades * 19 



Of Sensitive Plant *2 



Of Stamens ^ 



Effects of Anaesthetics upon Sensitiveness 424 



CHAPTER XIV. 

 REPRODUCTION. 



Individuality in Plants 426 



Methods of Reproduction 426 



FERTILIZATION i ANGIOSFERMS 426 



The Pistil 427 



The Stigmatic Secretion 427 



The Pollen-grain 427 



Structure ** 



Content* 428 



