CONTENTS OF VOLUME SECOND. 



INTRODUCTION. 



Sources of a History of Plants, - 



Page 



Page 

 3 



THE GENESIS OF PLANT-OFFSPRING. 



1. Asexual Reproduction. 



S|)ores and Thallidia, 

 Buds on Eoots, - 

 Buds on Stems, - 

 Buds on Leaves, - 



2. Eeproduction by means of Fruits. 



Definition and Classification of Fruits, 

 Fertilization and Fruit-formation in Crypto- 

 gams, ------- 



The Commencement of the Phanerogamic 

 Fruit, ------- 



Ovaries on a Conical Recept.-icle, 



Ov.aries on a Flat or Excavated Receptacle, 



Stamens, ------- 



Pollen, 



Protection of Pollen, 



Dispersion of Pollen by the Wind, 

 Dispersion of Pollen by Animals, 

 Allurements of Animals with a View to the 

 Dispersion of Pollen, - - - - 



25 

 28 

 37 



46 



49 



70 



75 



76 



85 



95 



104 



129 



152 



167 



The Colours of Flowers as a means of At- 

 tracting Animals, - - - - 182 

 The Scent of Flowers as a means of Attract- 

 ing Anim.als, - - - - - 198 

 Opening of the Passage to the Interior of the 



Flower, 209 



Reception of Flower-seeking Animals at the 



Entrance to the Flower, - - - 221 

 Taking up of Pollen by Insects, - • - 243 



Deposition of Pollen, 276 



The Crossing of Flowers, - - - - 287 



Autogamy, ------- 331 



Fertilization and Formation of Fruit in 



Phanerogams, 401 



3. Change in Reproductive Methods. 



Fruits Replaced by Offshoots, - - - 452 



Parthenogenesis, ----- 463 



Heteromorphism and Alternation of Geneia- 



tions, 469 



THE HISTORY OF SPECIES. 



1. The Nature of Species. 



Definition of Species, ----- 486 

 The Specific Constitution of Protoplasm, - 487 



2. Alteration in the Form of Species. 



Dependence of Plant Form on Soil and 



Climate, - 495 



The Influence of Mutilation on the Form of 



Plants, - - - - - - 514 



Alteration of Form by Parasitic Fungi, - 518 

 Alteration of Form by Gall-producing In.sects, 527 

 Genesis of New Forms as a Result of Crossing, 554 



3. The Origin of Species. 



The Genesis of New Species, 

 Derivation of Existing Species, - 

 Subdivisions of the Vegetable Kingdom, 

 Classification of Plants proposed by the 



Editor, ------ 616 



576 

 595 

 600 



