vi INTRODUCTION 



also to stand for a fresh interpretation of those characters which 

 recent investigations have proved to be of diacritical value. The 

 descriptive lists which will appear from time to time will be offered 

 as contributions toward regional floras. 



As the work progresses, it is hoped that studies other than 

 those of a purely systematic nature may appear, as additions to 

 the morphology, physiology, and ecology of the Orchidaceae. 



Throughout the series all papers, unless otherwise indicated, 

 will be from the author of the first fascicle. 



Oakes Ames. 



North Easton, Mass., 

 February, 1905. 



