192 Monograph of North American Rhynchosporce. 
or permitted me to examine them ; and have, in vai'ious 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 enth-e 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 tlie 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 INIr. 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 the 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 CaroHna. 
* Since this paper was prepared for the press I have had the oppor- 
tunity of consulting the niaiiuscripts and original herbarium of Dr. Bald- 
win, now in the jiosscssion of Dr. Torrey. Among his papers wc find 
detailed descriptions of all the species of Rhynchospora which his her- 
