North American CyperacecE-. 443 
Cladium effusum, p. 374. According to Mr. Nuttall, 
this plant extends a considerable distance northward beyond 
Wilmington, North Carolina, often occupying, almost exclu^ 
sively, considerable ponds. 
Carex TE^'UIFLORA, p. 392. Tackmahack Swamp, South- 
ampton, Massachusetts, Dr. Chapman!; Ogdensburgh, St. 
Lawrence Co., New- York, Dr. Crawc! 
C. suBULATA, p. 419. Near Fayetteville, North Carolina, 
Mr. Curtis ! 
ScLERiA RETICULARIS, p. 375. Wet sandy places, near 
the sea coast, Suffolk County, Long Island! September. 
S. LAXA, p. 376. Add, Hab. New Jersey to Florida; 
not found far from the sea coast ! September. 
Note. Mr. Arnott states, in a letter received since the fore- 
going sheets were printed, that he has examined the specimen 
on which Ceraloschcemis coriiiculatus of Nees ab Esenbeck 
was founded. The plant is, in his opinion, nothing more than 
Schoenus corniculatuSj Lam''Jc. (Rhynchospora corniculata, 
Gray) in which, contrary to the ysual state, the beak is some- 
what curved. The reader will perceive that the character of 
this well-marked genus has been amended in the present mo- 
nograph so as to apply to the normal form of C. corniculatuSs 
and also to include a new species. The specific name of La- 
marck must, of course, be retained. 
