SEDGK FAMILY. 

 2. Dichromena latifolia Baldw. Broad-k-avi.il Duhromena. (Fig. 600.) 



nichromena latifolia Baldw.; Kll. Hot. S. C. & 

 Ga. i: 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, \Y*' f -\" wide, 

 sometimes overtopping the culm, but the 

 lowest much shorter, those of the involucre 

 7-10, strongly reflexed when old. Head 

 globose, 6 // -<) // 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. .3. 



6. PSILOCARYA Torr. Ann. Lye. N. V. 3: 359. i 



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 raylrts 

 bracted at the base. Scales of the spikelets spirally imbricated all around, all fertile. 

 deciduous. Flowers perfect. Perianth none. Stamens i 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), cr nearly the whole style persistent as a 

 [Greek, referring to the absence of perianth-bristles.] 



About 10 species, natives of temperate and tropical America, 

 occurs in the southeastern United States. 



Achene strongly wrinkled, much longer than the subacute tubercle. 

 Achene smooth or but little wrinkled; tubercle subulate. 



following. another 



i / 



i. Psilocarya nitens (Vahl) Wood. Short-beaked Bald-rush. (Fig. 601.) 



.SV/V/>M.v nitens \';ihl, Knum 3 771. 1806. 



Psilocarya rhvncko*t**roidf%1art Ann. Ijrv 

 3: 361. 1836. 



Rhvnchosfmra nil.-n*. \ C.ray. Man. Bd. 4 J0& 

 1867. 



Psilocarya ni/r*s Wood, Hot. & PI. j6* 



Glabrous, culms tufted, slightly angled, J' 

 15' tall. Leaves narrowly linear, aboat t ' ' wide, 

 smooth, sometimes overtopping the cnbn. 

 sheathing at the base, the milvrtn prtmv 

 umbels mostly loose; spikeleto oroid, : 

 long, rather less thu; **?*** 



brown, broadly ovate, thin, i-nenwd, obtnn, 

 acute or apictilate; achene lenticnJar, nearly 

 orbicular, light brown, strongly wrinkled tfMM 

 versely; tubercle shorter than the achene. Mb- 

 acute, 2-lobed at the base. 



In wet soil. Long IUd, N-V_. wd 

 Florida and Texas, near the cos*. 



