TABLE OF CONTENTS 



INTRODUCTION 



■mm 



TAXONOMIC PRINCIPLES 



The categories 7 



PhYLOGENETIC concepts and TAXONOMIC SYSTEMS l4 



Systems of classification 16 

 Two-dimensional phylogenetic diagrams 18 

 Three-dimensional phylogenetic diagrams 23 

 Classification of vascular plants 23 

 Parallelism as a factor in classification 27 

 The fallacy of the "fundamental" character 31 



