CONTRIBUTIONS FROM THE GRAY HERBARIUM OF HARVARD 

 UNIVERSITY.— NEW SERIES, No. LV. 



Bv B. L. Robinson. 



Presented May S, 1918. Received June IS, 1918. 



I. DIAGNOSES AND NOTES RELATING TO TROPICAL 

 AMERICAN EUPATORIEAE. 



During the past year, in the course of further work toward a com- 

 prehensive treatment of the Eupatoriiim tribe, the following plants 

 have been encountered, which appear to need description as novelties, 

 readjustment of rank, or further record as to standing or synonymy. 



Several types of new species and varieties here proposed are hither- 

 to unclassified specimens (notably those of Triana, of Lobb, and of 

 Kalbreyer) kindly lent to the writer some time ago from the Royal 

 Gardens at Kew for investigation as opportunity permitted. These 

 are indicated by the abbreviation (K.). For the privilege of examin- 

 ing and publishing upon others the writer is similarly indebted to the 

 botanists of the New York Botanical Garden (N. Y.), the United 

 States National Herbarium (U. S.), Missouri Botanical Garden (Mo.), 

 Field Museum (Field Mus.), and University of California (Calif.). 

 Plants in the Gray Herbarium are indicated by (Gr.). During the 

 preparation of this paper much aid has been derived from photographs 

 which the writer was permitted to take of t^^jes in European herbaria 

 during his journeys in 1900, 1905, and 1910. In some cases fragments 

 of types or authenticated specimens have been supplied to the Gray 

 Herbarium in return for similar bits from types in this or other groups. 

 Occasionally tracings or sketches have also been made. The nature 

 of such reference material is briefly indicated by abbreviations which 

 will be self-explanatory (phot., fragm., trac, sk., &c.). 



The writer is specially indebted to Drs. H. H. Rusby & F. W. 

 Pennell for the privilege of studying the Eupatoriums of their recent 

 and extensive collection from Colombia. Dr. Rusby has also per- 

 mitted the inclusion here of his E. Squiresii, a hitherto unpublished 

 novelty discovered on an earlier expedition to Venezuela. Prof. N. L. 

 Britton has aided the writer by the loan of valuable material and by 

 information, from time to time as solicited, regarding specimens in 



