ARKIV FOR BOTANIK. 



BAND 13. N:o 15. 



LfBRARY 



West Indian Vernoniae. Rn?ll fi 



botanical 



By flAKOfc/v, 



E. L. BKMAN. 



With 6 plates. 

 Communicated January 14th by G. Lagerheim and C. A. M. Lindman. 



Introduction. 



Six years ago, the author of this paper made a journey 

 to South America in order to study its flora. In the Argentine 

 Territorium of Misiones I had an opportunity to stay for sev- 

 eral months, and I there brought together considerable collec- 

 tions of plants, the determination of which has been carried on 

 at the Natural History Museum at Stockholm. I soon found 

 that the determination of certain genera offered great difficul- 

 ties. My attention was especially drawn to the classification 

 of the Vernoniae in the great Regnellian Herbarium at Stock- 

 holm, but I soon extended my studies to include all Brazilian 

 Vernoniae. Some taxonomic questions obliged me to examine 

 the value of several West Indian species. While working 

 with the Vernoniae of the West Indies, I consulted, in the 

 first place, an important paper entitled A Revision of the 

 North American Vernonieae , having for its author Mr. Hen- 

 ry Allan Gleason from Chicago. At first sight, this work 

 inspired confidence by the apparently practical and natural 

 arrangement of the species, and by their accurate delimi- 

 -tation supported by geographical facts. But I soon was able 

 -to state that the author had not the right conception of the 

 species of Swartz, the types of which are in the Stockholm 



Arlciv for botanik. Band 13. N:o 1~>. 1 



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