253 North American Cyperacece. 
Hab. In wet places, particularly near salt water, Massa- 
chusetts! to Pennsylvania! — Sept n.b.T. 
Obs. Nearly allied to C. jiavescens, but differing in the form 
and colour of the spikelets, the diandrous flowers, aid kr^^er 
dull nuts, &c. It is easily reccgnised by its handsome, com- 
pressed, light-brown spikelets. 
jS. ? castaneus. 
Culms cespitose ; rays mostly very shor: ; scaler subcoria- 
ceous, shining, closely imbricated ; style scarcely exserted. 
C. castaneus, Big. ! fl. Bost. ed. 2. (not of Willd.) 
C. flavescens /3. castaneus, Pursh, fl. 1. p. 52. 
C. bicolor, Bart. fl. Phil. 1. p. 27, (not of Vahl.) 
Plant about 3 — 4 inches high. Culms numerous, tough, and rather 
rigid, often prostrate. .Spi^-eZe^s oblong-lanceolate. Scales very closely 
imbricated, and of a firm texture, dark-chestnut on the sides, with a green 
keel. Stamens frequently 3 in the upper florets. Style scarcely twice 
the length of the nut, and generally making a short curve before emerg- 
ing from the scale. Nut gray or light-brown, dull, somewhat scabrous. 
Hab. On the muddy and sandy banks of rivers ; Massa- 
chusetts ! to Pennsylvania ! Very common in New England ! 
and in the western parts of the state of New York ! — August, 
September. 
Obs. The peculiar characters of this variety may be owing 
to the situations in which it grows. Its appearance, however, 
is very distinct from C. diandrus, as described above. Muhlen- 
berg notices it in his Desc. uber. gram, as a " co-species" of C. 
jiavescens. 
3. Cyperus Nuttallii, Torrey. 
Rays few, short or nearly sessile, loose ; spikelets linear- 
lanceolate, compressed, acute; scales oblong-lanceolate, acute; 
stamens 2 ; nut oblong-obovate, very obtuse, dull ; culms ces- 
pitose, acutely triangular; involucre 4-leaved, two of the 
leaves very long. 
C. Nuttallii, Ton. ! in Spreng. neue entd. 1. p. 240 ; Terr. ! fl. 1. 
p. 60; Schult.mant. 2. p. 109; Spreng.! syst. I. ip. 222 ; Beck! bot. 
p. 142; Gray ! Gram, and Cyp. part 1. no. 69. 
