CONTENTS. 



Page. 



Introduction. 343 



Basis and methods of the work 343 



Economic importance of the grama grasses 344 



Adaptability to cultivation 345 



Distribution 346 



Illustrative material 348 



Limitation of the genera 348 



Bibliographical notes 350 



Description of the genera and species 351 



List of specimens deposited in public herbaria 425 



Index , ix 



v 



