NORTH AMERICAN SPECIES OF RHYNCHOSPORA. 
they also have simple and entirely persist- 
ent styles, and might perhaps be referred 
to the genus Cephaloschenus' of Nees von 
Esenbeck. 
15. R. dodecandra (Baldwin); pani- 
culis corymbosis laxiusculis, spiculis ovato- 
lanceolatis, staminibus duodenis, nuce ob- 
longa levi tuberculum subhemisphericum 
longe — setis sursum hispidulis 
nucem equanti 
R. TINH, “Baldu. MSS. et Herb: 
Culm triquetrous, two feet or more high. 
Radical leaves not seen. Cauline leaves 
equalling the culm, rigid, and subcoriace- 
ous, three to four lines wide, smooth, a 
little scabrous on the margin. Panicles 
five to six, lateral and terminal, on pedun- 
cles twice the length of the sheaths, corym- 
bose, loosely flowered; the lateral ones 
simple, the terminal one compound, or 
with two or three clustered together at the 
summit of the culm. Spikelets ovate- 
lanceolate, sessile and pedicellate. Glumes 
chestnut-coloured. Bristles six, equalling 
the nut, minutely hispid upward. Stamens 
ten to twelve. Anthers long-linear, orange- 
red. Style bifid. Nut (immature) oblong, 
somewhat attenuated downwards, smooth 
or slightly corrugated longitudinally. Tu- 
bercle short, hemisphærical, somewhat com- 
pressed, as wide as the summit of the m 
Has. “Near the sea-shore. For 
George Fes; E. Florida, April, sit 
Dr. Ba 
Oss. The habit of this remarkable 
species is very similar to that of R. corni- 
culata in a young state. Dr. Baldwin re- 
marks of the present, that its bristles 
equal the stamens in number. I have seen 
only six in the specimens I have examined. 
16. R. megalocarpa ; hexandra, corym- 
bis sparsifloris, nuce ovata lenticulari levi 
nigrescente, tuberculo obtuse conico con- 
fluente, setis caducis sursum hispidulis r nu- 
cem subequantibus. 
s FaN: OSCHENUS. Spicule hermaphrodite. 
mplex. setosum, setis antrorsum 
fa. aut hirsutis. Caryopsis styli basi ing 
2 discretaque rostrata.” Nees, Cyp. Ii 
VOL. II. 
33 
Schenus macrocarpus, Baldw. MSS. 
et Herb.! 
Culm glabrous, somewhat triangular, 
four feet high. - Leaves rigid and coriace- 
ous, pungently acute, carinate, smooth : 
radical leaves numerous, one to two feet 
long, three to five lines wide; cauline ones 
few and short. Corymbs axillary and ter- 
minal, exsertly pedunculate, few and loosely 
owered. Spikelets about one-third of an 
inch long, ovate, tumid, sessile or on short 
pedicels. Glumes obtuse, the inner ones 
mucronate. Bristles six, caducous, mi- 
nutely scabrous upward, equalling the nut. 
Stamens six. Nut (including the tubercle) 
two to three lines long, smooth and shin- 
ing, becoming black with age, round-ovate, 
and strongly convex on both sides. Tu- 
bercle turgidly conic, much shorter than 
the nut, with which it appears confluent. 
Has. Fort George, E. Florida. 
The bristles in this species are 
so exceedingly caducous that they escaped 
the notice of Dr. Baldwin, who referred the 
plant to the genus Schenus. He remarks, 
however, that it only differs from Rhyn- 
chospora in wanting the bristles. 
R pycnocarpa ; corymbis sparsi- 
floris, spiculis turgido-ovatis, nuce levi 
ovata tumida vertice crasso tuberculo acu- 
tiusculo brevissime conico ampliore setis 
denis caducis sursum hispidulis nucem 
subequantibus. 
Culm triangular, two to three feet mest 
Leaves rigid, broad-linear, carinate, p 
gently acute; the lower ones losga. 
three to four lines broad; the upper ones 
narrower, short. Corymbs terminal and 
lateral, somewhat distant, few and loosely 
flowered. Spikelets ovate, turgid, three to 
four lines in length. Glumes ovate, acute 
or mucronate. Bristles ten, equalling the 
nut, or a little shorter, minutely hispid up- 
ward, somewhat caducous. Stamens three. 
Style slender, deeply bifid. Nut rufous, 
smooth, and shining, slightly attenuated 
and domcpeeoned at the base, tumid above, 
with the summit somewhat thick and 
wider than the depressed, conic, very short 
tubercle, 
Cc 
