CONTENTS 



CHAPTKR 



PAOE 



I. General Principles ... ... ••• ••• 1 



11, The Peinciple of Number ... ... ... 7 



III. The Principle of Number — Continued ... ... 25 



IV. The Principle of Arrangement ... ... 39 



V. The Principle of Cohesion ... ... ... 48 



VI. The Principle of Cohesion — Continued ... 54 



VII. The Principle of Cohesion— Continued ... ... 62 



VIII. The Principle of Adhesion ... ... ... 78 



IX. The Cause of Unions ... ... ... ••. 84 



X. The Receptacular Tube ... ... ... 89 



XL The Forms of Floral Organs ... ... ... 101 



XII. The Origin of " Zygomorphism " ... ... 116 



XIII. The Effects of Strains on Structures ... ... 123 



XIV. Acquired Regularity and "Peloria" ... 128 

 XV. The Origin op Floral Appendages ... ... 133 



XVI. Secretive Tissues ... ... ... ... 1^0 



XVII. Sensitiveness and Irritability of Plant Ougans ... 151 



XVIII. Origin of Conducting Tissues ... ... 164 



