4 



late Professor Roeper, of Rostock. i8. Michaux's collection (Hb. 



Michx.), also at Paris. 



J 



des Plantes (Hb. Paris.). 20. The herbarium of Steudel (Hb. 

 Steud.), now in the possession of the Comte de Francqueville, 

 and kept in Paris. I was allowed to inspect this collection through 

 the courtesy of the proprietor, and his secretary, M. Jules Pois- 

 son. Many of the perplexing species of Steudel are not repre- 

 sented in his own herbarium. Those which are founded upon 

 Drummond's collections, I have been able largely to identify at 

 Kew, Berhn, and Cambridge, Mass. Two species described by 

 Steudel and attributed to Chamisso are said, in the text, to have 

 been founded upon specimens in the herbarium of Lenormand. 

 I therefore went to Calvados, and found in, 21, the collection of 

 Lenormand at Caen (Hb, Lenorm.), nearly all the remaining am- 

 biguous species of Steudel. 22. The collections at Columbia 

 College, New York (Hb. Torr.), in which are many types of 

 American authors. 23. The collections at Harvard (Hb. Gray.), 

 very rich in American material. 24. The herbarium of the late 

 William Boott, now at Cambridge, Mass. 25. The collection of 

 Schweinitz (Hb. Schw.), in the possession of the Philadelphia Acad- 

 emy of Sciences, and kindly loaned me by the Academy through 

 the courtesy of the curator, J. H. Redfield. With this collection, 

 I also had that of Zaccheus Collins. 26. Dewey's annotated 

 and augmented set of Sartwell's Exsiccatae, loaned me by the 

 authorities of Williams College. In addition to these herbaria, I 

 have had access to many smaller collections in many places. I 

 have not been able to find the types of Scheele, but his descrip- 

 tions leave little doubt as to the identity of his species.* Steu- 

 del's Carex Preslii (founded upon Presl's C. leporifta), is not 

 clearly accounted for. 



The abbreviation v. s, {vidi siccam, " I have seen a dried 

 specimen ") indicates that I have seen the original specimen upon 

 which the species in question was founded. Following the de- 

 scription of a new species, I have added a number in parenthesis 

 to indicate the position the species should occupy in my Synop- 

 sis. (Proc. Amer. Acad. Arts and Sci. xxii. i886). 



*C tetrastachySj C Rcemeriana^ C. scaber?'ima^ C variegata. 



:^w 



