CONTENTS. 



PAGE 



Thermotropism 394 



Assumption of Definite Form during Growth 394 



Amount of Force exerted during Growth 395 



CHAPTER XIII. 

 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 . c 405 



In Twining Plants 405 



Modified Circumnutation 407 



Nyctitropic 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 



Of Roots 41 5 



Of Stems and Branches 417 



Of Tendrils 17 



OfPetioles 41 



Of Leaf-blades 419 



Of Sensitive Plant 



Of Stamens 423 



Effects of Ansesthetics upon Sensitiveness 



CHAPTER XIV. 

 REPRODUCTION. 



Individuality in Plants 



Methods of Reproduction 



FERTILIZATION IN ANGIOSPERMS 



The Pistil 427 



The Stigmatic Secretion 



The Pollen-grain 



Structure 



Contents 428 



