Norl/t AmtticaiL Cyj^cniccce. 2i.b 
lers ill British Ameiica, for many specimens from the JNorth 
West Coast, and for a set of 3Ir. Drummond's plants collected 
in Louisiana and Texas, containing many rare species of this 
family. To my excellent friend G. W. Arnott, Esq. of Scotland, I 
am under many obligations for a good set of the Cyperacete col- 
lected by Dr. Wight in the Peninsula of India, which have been of 
great use to me in the examination of our native species, as they 
are duplicates of the collection from wliich N. ab Eseubeck prepar- 
ed liis Cyperacese Indicas. I have also received many other' 
exotic Cyperacese from Mr. Arnott and Dr. Lindley. Major Le 
Conte, Rev. M. A. Curtis of North Carolina, H. B. Croom, 
Esq. of Tallahassee, Dr. Chapman of Middle Florida, Dr. In- 
galls of New Orleans, and Dr. Loomis of Georgia have sup- 
plied nle with numerous specimens of southern Cyperaceae. 
Dr. Pitcher of the Army, has contributed some valuable mate- 
rials from Arkansas, and from the borders of the great lakes. 
The late estimable Stephen Elliott, Esq. supplied my herba- 
rium wuth several of the Cyperaceae described in liis excellent. 
Flora ; and I only regret that I have not been able, by an ex- 
animation of his own herbarium, to verify all the species 
which he has described. Prof. Dewey has sent me most 
of the Carices described in his valuable Caricography. My 
valued friend B. D. Greene, Esq. of Boston has supplied me- 
with New England and southern Cyperaceae, and likewise, 
loaned me his entire set of Texan plants collected by the late^ 
Mr. Drummond. T. A. Greene, Esq. and Prof. Hitchcock of 
Amherst, have contributed several interesting plants of this- 
family, from Massachusetts. To my higJily esteemed corres- 
pondent. Dr. Short of Kentucky, as also to Dr. Peter, I am 
greatly indebted for large supplies of the Cyperaceae of that 
state. My excellent friend, J. Carey, Esq. has greatly obHged 
me by the communication of many valuable observations on the 
subjects of this monograph, as well as by supplying me with 
specimens from various localities. Some interesting Cypera- 
cece have been obligingly sent to me by Dr. Darlington, from 
Chester County, Pennsylvania. INIy lamented friend the late 
Rev. Dr. Schweinitz was a lar<ie contributor to mv herbarium, 
