744 



ORDER 155. CYPJSRACEJS. 



drooping panicles; seta nearly twice longer than the rugous, oblong, flattish aeh&. 

 nium and short tubercle. Wet soils, S. Car. to Fla. and La. (Schoenus MX.) 



7 R. miliacea Gray. Culm slender, triangular, very leafy below, 2f high, fistu- 

 kms- Ivs. rather rigid, flat, lance-linear, smooth, glaucous, 6 to 8' long, 3 to 4" 

 wide ; spikes obovate, ail pedicellate, 3 to 5-flowered, forming diffuse, compound, 

 axillary and terminal cymous panicles; setae 6, a little longer than the roundish 

 obovate achenium and very short tubercle. Wet pine barrens, N. Car. to Fla. 

 and La, (R. sparsa Vahl. Schcenus Lam.) 



8 R. caduca Ell. Culm acutely triangular, 1 to 3f high ; Ivs. broadly linear, 

 smooth, 2 to 3" wide; spikes ovate, large (4 to 5" long), pedicellate or sessile, in 

 several rather close, erect, axillary and terminal panicles; glumes caducous, ovate, 

 tlu outer broad; setae, twice longer than the orbicular-ovate, rugous achenium; 

 tubercle flattened, conical, a third as long as the achenium. Wet soils, N. Car. 

 to Fla. 



9 R. schcenoides. Culm triangular, 2 to 3f high, leafy at base; Ivs. linear, 2'' 

 wide, glabrous, not half the length of the culm; spikes very numerous, lance-ovate, 

 small (2'' long), sessile or nearly so, clustered, forming several axillary and terminal, 

 pedunculate panicles; glumes fuscous, broad-ovate; setce twice as long as the 

 obovate, flat, rugous achenium and small tubercle. Bogs, Ga., Fla. to La. (Scir- 

 pus, Ell.) 



10 R. patula Gray. Culm 3-angled, thick and stout at the base, 2 f high; lv-3. 

 linear, short; spikes ovate, small (2" long), forming several spreading, loose-flow- 

 ered corymbs, of which the terminal one is much the longest setae scarcely ex- 

 ceeding the roundish, flattened, strongly rugous achenium and tubercle, the latter 

 nearly half as long as the former. Ga. and Fla., rare. 



'11 R. Elliottii Gray. Culm 3-angled, slender, 1 to 2f high; Ivs. linear, flat r 

 glabrous, serrulate on the margins, the cauline short ; spikes ovate, sessile in fasci- 

 cles forming 3 or 4 few-floivered, subsimple corymbs, borne on exserted peduncles ; 

 setse a little longer than the roundish-ovate, minutely rugous achenium ; tubercle 

 very short, flattened, conic. Wet soils, Ga. and Fla. Jn. Sept. 



12 R. microcarpa Baldw. Culm slender, teretish, tufted, nearly naked ; Ivs, 

 narrowly linear, setaceous at end, mostly radical ; spikes turgid-ovate, dark brown, 

 1 to 2'' long, loosely fascicled in several approximate, pedunculate corymbs ; seta> 

 very fragile, scarcely equaling the minute, ovate, flat, rugous achenium. Wet 

 grounds, N. Car. to Fla. 



13 R. ptmctata Ell. Culm slender, B-angM, 1 to 2f high ; Ivs, lance-linear, 

 acute, rough-edged ; spikes ovate, chestnut brown, fascicled, in several peduncu- 

 late corymbs; seta? a, little longer than tho achenium, which is ovate, compressed, 

 and rugous-netted, with impressed dots in- the furrows. Marshes, Ga. and Fla. 



14 R. alba Vahl. Culm triangular above, very slender, leafy, smooth, 10 1G' 

 high ; Ivs. linear-setactous, channeled ; corymbous fascicles pedunculate, both ter- 

 minal and from the axils of the sheaths, with setaceous bracts; spikelets lanceo- 

 late, acute at each end, with crowded, lanceolate, whitish glumes; setce 9 or 10, 

 as long as the ach. and tubercle. In wet, shady grounds ; common. July Sept. 



15 R. Knieslsernii Carey. Culms in tufts, 6 to 16' high, slender; Ivs. mostly 

 cauline, setaceous, linear, shorter; spikes small (!'' long) in 4 or 5 dense fascicles, 

 distant along the whole length of the culm; seta? G, downwardly hispidulous, as long 

 as the minute, obovate achenium. In bog iron soil, N. J. (Holton), rare. (R. 

 distans? Nutt.) 



16 R. capillacea Torr. Culm 6 to 12' high, filiform, glabrous, triangular; Ivs. 

 setaceous, much shorter than the stem; spikes \ to 3 to 6 (mostly in 1 terminal 

 fascicle), oblong, each with a setaceous bract; glumes chestnut-colored, with scar- 

 ious edges ; bristles G, much longer than tho oblong, substipitate achenium ; tuber- 

 cle about half the length of the achenium. Swamps, N. Y. (Sartwell), Pemn. to 

 Mich. 



17 R. fusca Roem. & Schult. Culm 3-angled, about 2f high; Ivs.setaceous-carin- 

 ate ; smooth ; fascicles alternate, pedunculate ; bracts setaceous, longer than -the 

 ovoid spikes ; glumes brown, ovate ; ach. obovate, its pointed tubercle 03 long, both 

 equaling the hispid setae. Wet places, Mass, to N. J., rare. 



