TABLE OF CONTENTS 



CHAPTER I. 



Page 



Descriptive Manual 1 



CHAPTER II. 

 The General Characters of Seeds 405 



CHAPTER III. 

 The Microscopic Structure of Some Weed Seeds 503 



CHAPTER IV. 

 Morphology of Flowers and Leaves 589 



CHAPTER V. 

 Scattering of Weeds 627 



CHAPTER VI. 

 rtoots and Root-stocks of Weeds 641 



CHAPTER VII. 

 Number and Kinds of Weeds in Different Soils 655 



CHAPTER VIII. 

 Injuriousness of Weeds 669 



CHAPTER IX. 

 Weed Migration 685 



CHAPTER X. 

 Medicinal Weeds 771 



CHAPTER XI. 

 Phenology of Weeds 783 



CHAPTER XII. 

 Weed and Seed Laws 791 



CHAPTER XIII. 



History and Bibliography 817 



Glossary 862 



