il ele 
ae 
SEDGE FAMILY. 257 
2. Dichromena latifélia Baldw. Broad-leaved Dichromena. (Fig. 600. ) 
ae 
\ 
S 
QV 
Dichromena latifolia Baldw.; Ell. Bot. S.C. & 
Ga. 1:90. 1816. 
Similar to the preceding species but the 
culm stouter, obtusely triangular or nearly 
terete, the leaves lanceolate or linear-lance- 
olate, tapering gradually to a long-acumi- 
nate apex from a broad base, 134/’-4’’ wide, 
sometimes overtopping the culm, but the 
lowest much shorter, those of the involucre 
7-10, strongly reflexed when old. Head 
globose, 6’’-9’’ in diameter; spikelets ob- 
long, subacute; scales ovate-lanceolate, 
nearly white, rather obtuse; achene nearly 
orbicular in outline, pale brown, faintly 
wrinkled transversely and longitudinally, 
so as to appear reticulated; tubercle decur- 
rent on the margins of the achene. 
In wet pine barrens, Virginia to Florida and 
Texas. June-Aug. 
6. PSILOCARYA ‘Torr. Ann. GyGieNemvens:g59.. S36: 
Annual sedges, with fibrous roots, slender leafy stems and ovoid or oblong, many-flow- 
ered terete spikelets in terminal and axillary, mostly compound umbels, the rays and raylets 
bracted at the base. Scales of the spikelets spirally imbricated all around, all fertile, 
deciduous. Flowers perfect. Perianth none. Stamens 1 or 2. Style 2-cleft, enlarged at 
the base. Achene lenticular or biconvex, smooth or transversely wrinkled, capped by the 
persistent base of the style (tubercle), or nearly the whole style persistent as a beak. 
{Greek, referring to the absence of perianth-bristles. ] 
About 10 species, natives of temperate and tropical America. Besides the following, another 
occurs in the southeastern United States. 
Achene strongly wrinkled, much longer than the subacute tubercle. 1. P. nitens 
Achene smooth or but little wrinkled; tubercle subulate. 2. P. scirpoides. 
1. Psilocarya nitens (Vahl) Wood. Short-beaked Bald-rush. (Fig. 60r.) 
Scirpus nitens Vahl, Enum. 2: 272. 1806. 
on H P . r 
We f Psilocarya rhynchosporoides Torr. Ann. Lyc. N. Y. 
a XY 3: 361. 1836. 
Rhynchospora nitens A. Gray, Man. Ed. 5, 568. 
1867 
7° 
Psilocarya nitens Wood, Bot. & Fl. 364. 1870. 
Glabrous, culms tufted, slightly angled, 3’— 
15’ tall. Leaves narrowly linear, about 1’ wide, 
smooth, sometimes overtopping the culm, 
sheathing at the base, the midvein prominent; 
umbels mostly loose; spikelets ovoid, 2’/—3/’ 
/ long, rather less than 1/’ in diameter; scales 
\ brown, broadly ovate, thin, 1-nerved, obtuse, 
\\ acute or apiculate; achene lenticular, nearly 
orbicular, light brown, strongly wrinkled trans- 
| versely; tubercle shorter than the achene, sub- 
acute, 2-lobed at the base. 
3 
\ a In wet soil, Long Island, N. Y., and Delaware to 
rH! \ Florida and Texas, near the coast. July—Oct. 
