192 Monograiih of North American Rhynchospone. 



or permitted me to examine them ; and have, in various ways, 

 favoured me with important assistance. 



To the kindness of Abraham Halsey, Esq. I am indebted for 

 the drawings of the fruit, &c. of all the species which are de- 

 scribed in this paper. My acknowledgments are also especially 

 due to Professor Torrey ; who has, with great liberality, placed 

 in my hands his entire collection in this genus, together with 

 some interesting notes upon the specimens contained in the 

 herbarium of Michaux, at the Garden of Plants in Paris ; and a 

 suite of the spikeletsand flowers of most of the species described 

 by that author, taken, by the kind permission of the curators, 

 from his original specimens. By the aid of these specimens 

 and notes, I have been enabled to determine, with entire satis- 

 faction, all the species described in the Flora Boreali-Ameri- 

 cana of Michaux. 



The herbarium of Professor Torrey is also especially rich in 

 specimens from the southern states, communicated by the late 

 Mr. Elliott, the late Rev. Mr. Schweinitz, Dr. T. R. Ingalls, 

 of New Orleans, Rev. ]Moses A. Curtis, of Wilmington, North 

 Carolina, &c. 



I am also under obligations to Dr. Charles Pickering, princi- 

 pal curator of the Academy of Natural Sciences at Philadel- 

 phia, for the opportunity of examining the herbarium of the late 

 excellent Mr. Schweinitz, now in the possession of that insti- 

 tution. I also had the privilege of examining a very extensive 

 and interesting collection in this genus, made in Georgia and 

 Florida by tlie late Dr. Baldwin of the United States navy and 

 army : a suite of which, with the original labels, now forms a 

 part of that herbarium.* Major J. Le Conte had the kindness 

 to allow me to examine a fine collection made by himself in 

 Georgia and South Carolina. 



* Since this paper was prepared for the press I have had the oppor- 

 tunity of consulting the manuscripts and original herbarium of Dr. Bald- 

 win, now in the possession of Dr. Torrey. Among his papers we find 

 detailed descriptions of all the species of Rhynchospora which his her- 



