TABLE OF CONTENTS xi 



9 



13 



ALKALOIDS 1 55 



Some major classes of alkaloids 157 

 Some general considerations of alkaloid distri- 

 bution AND PHYSIOLOGY 164 



General considerations of the systematic value 

 of alkaloids 168 



Specific examples of alkaloids of systematic 

 significance 170 



CYANOGENETIC SUBSTANCES 181 



PHENOLIC SUBSTANCES 191 



Some basic considerations of biosynthetic path- 

 ways INVOLVED IN THE PRODUCTION OF PHENOLICS 194 



Chemical structures of classes of flavonoid 



compounds 198 



Genetic studies concerning the flavonoid 



compounds 202 



Systematic aspects of the distribution of 



phenolic compounds 209 



QUINONES 223 



TERPENOIDS 231 



