CONTENTS 



Page. 



Introduction 247 



Establishment of the genus 247 



History of species hitherto known 249 



General characters and their systematic value 251 



Habit 251 



Roots 251 



Trunk 252 



Two forms of branches 252 



Leaves 252 



Three forms of inflorescence 253 



Primary male inflorescence 254 



Complemental male inflorescence 256 



Pistillate inflorescence 257 



Inf ructescence 258 



Preliminary survey of species 259 



Systematic treatment - - 261 



Revision of generic characters 261 



Description of species 262 



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