North American Cyperacea. SSd 
C. ca-piti<:ii-, Torr.f cat. pi. N. YorTc, p. 89, (not of Poiret)\ 
Spreng. ! syst. 1. p. 224. 
C. Torreyanus, Schult mm t 2. p. '01. 
C. tenuis, Muhl. ! gram. p. 22. (in part.) 
Perennial. Culms 4 — 12 inches high, forming dense tufts. Leaves 
narrow, nearly as tall as the culm. Umbel sometimes very distinctly 
rayed, the rays 3 — 4 in number, usually very short. Involucre of two 
short and two very long leaves. Spikelets alternate, sometimes com- 
pound, closely approximated on the rachis, nearly an inch in length, and 
a line and a half broad, much compressed, very acute. Scales loosely 
imbricated, especially when the spikes are mature, rather cartilagin- 
ous, very minutely three-toothed at the rij ; the sides of a yellowish- 
brown colour, the keel green. Stamens always 2. Sty'e deeply two- 
parted. Nut gray or light-brown, narrow-obovate, and almost truncated 
at the apex ; under a strong lens somewhat roughened with minute 
elevated dots. 
Hab. On the borders of salt marshes; very abundant in 
the vicinity of New York ! and along the coast of New Jersey ! 
North Carolina, Mr. Curtis!; Charhstcn, South CaroHna, 
B. D. Greene, Esq. ! ; Alabama, Dr. Gates ! ; New Orleans, 
Dr. Ingalls ! 
4. Cyperus flavicomus, Michx. 
Umbel many-rayed, somewhat compound ; spikelets lanceo- 
late-linear, numerous, many- (12 — 30)-flowered, spreading j 
scales oblong, very obtuse, with a broad scarious margin, when 
mature distinct, and somewhat spreading ; stamens 3 ; nut 
obovate, with a short abrupt point. 
C. flavicomus, Michx. ! fl. 1. p. 27 ; Pursh, fl. 1. p. 53 ; Elliott! 
tk. 1. p. 71 ; Muhl. ! gram. p. 24 ; Vahl, enum. 2. p. 260 ; Ram. Sf 
Schult. syst. 2. p. 215. 
Annual? Culm 1-3 feet high, triangular. Involucre 3 — 5-leaved, very 
long, somewhat glaucous. Umbel spreading ; rays about five, 2 — 3 inches 
long. Spikelets three-fourths of an inch long, and one and a half line wide ; 
on the lower part of the rachis compound, spreading horizontally or even 
reflexed, when old. Scales somewhat emarginate, the sides light yel- 
lowish-brown, with a green three-nerved keel, and a conspicuous white 
