2S2 North American Cyperacea. 
flat, widely spreading, loosely imbricated, yellow-ferruginous, shining. 
Scales oblong. Vahl, enum. 2. p. 332 ; Pursh,fi. 1. p. 52 ? 
In swamps of Virginia and North Carolina, Vahl, Pursh. — As the 
characters of the fruit are not given by Vahl, it is impossible to identify 
this species, or even to point out the section of the genus to which it 
belongs. I am inclined, however, to believe, that it is one of the Pycreus 
group, and probably C. diandrus. Pursh's imperfect specimen in Lam- 
bert's herbarium seems to be C. Nuttallii. Nees, in the catalogue of 
Cyperi examined by him {Linneea, 1. c.) places C.filicinus in the section 
Aristati, but his plant must be distinct from the species above described. 
4. C. ODORATUs, Linn. ? ; Pursh, fl. 1. p. 52, (excl. syn.) 
"On the banks of rivers, Pennsylvania to Florida, rare," Pursh. — 
Linnaeus, and Willdenow, under C. odoratus, refer to G-ron. fl. Virg. p. 
131 , and this is probably the reason why Pursh described this species 
in his work. It does not appear, however, that the true C. odoratus 
has been foimd La North America. 
5. C. DiSTANS, Linn.? ; Pursh, fi.\. p. 53. (excl. syn.) 
•'In sandy wet woods; Carohna and Georgia," Pursh. — Pursh is 
the only writer on North American Botany who has introduced tliis 
species into our Flora. Can his plant be C. stenolepis of this Mono- 
graph? 
6. C. Fuscos, L. — Sprengel, in his Systema Vegetabilium, (1. p. 223.) 
states that this species inhabits North America, but I consider it a very 
doubtful native. 
7. C. BRizJius, Richard! ; Pursh, fi. 1. p. 51. 
In swamps of Carolina, Pursh. 
The C. hrizceus of Richard and Vahl, a native of Cayenne and Porto- 
rico, seems to be a very distinct plant from Pursh's, which, I am inclined 
to think, is merely a variety of C. diandrus. 
Since the preceding matter was written and mostly printed, I have 
received from my friend G. A. W. Arnott, Esq. an extract from a MS. 
of N. ab Esenbeck on some N. American Cyperaceae, particularly those 
collected by Drummond in his last expeditions. Among the species 
found by Drummond near St. Louis, Nees notices C. Elliottianus, (my 
C. diandrus?), C.filicinus (probably not Vahl's plant), C. repens, and C. 
Kyllingceoides, which last, as Mr. Arnott remarks, must be C.filiculmis, 
and not the East Indian C. Killingceoides. 
