■744 Oedbe 155.— OYPERACE^. 



drooping j)amcfes ; setce nearly twice longer tban the rugous, oblong, flattisli aohe- 

 nium.and short tubercle. — ^Wet soils, S. Car. to Fla. and La. (SchcEnus Mx.) 



7 R. mili^cea Gray. Culm slender, triangular, very leafy below, 2f higli, fistu- 

 lous; Ivs. rather rigid, fiat, laTice-Unear, smooth, glaucouSi-^G to 8' long, 3 to 4" 

 ■wide ; spikes obovate, aM pedicellate, 3 to 6-flowered, forming diffuse, compound, 

 axillary and terminal oymoua panicles; selce 6, a Utile longer than the roundisii 

 obovate aohenium and very short tubercle. — ^Wet pine barrens, IS'. Car. to Fla. 

 and La. (R. sparsa Vahl. Schoenus Lam.) 



8 R. oaduca 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, 

 the outer broad ; setce twice longer tlian tlie orbicular-ovate, rugous achenium ; 

 tubercle flattened, conical, a third as long as the aohenium. — TVet 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-ovato; setse twice as long as the 

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

 pus, EIL) 



10 R. patula Gray. Oulm 3-angled, thick and stout at the base, 2f Iiigh; Ivs. 

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

 ered corymbs, of which the termihal one is much the longest ; set^ scarcely ex- 

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

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



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

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

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

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

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



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

 narrowly linear, setaceous at end, mostly radical ; spilces iwrgid'ovate, dark brown, 

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

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

 pounds, N. Car. to Fla. 



13 R. punctata Ell. Culm slender, 3-angled, 1 to 2f high ; Ivs. lance-linear, 

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

 late corymbs ; setse a little longer than the achenmm, 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—16' 

 high ; Ivs. linear-setaceous, 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 ; seiie S or 10, 

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



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

 caulifle, setaceous, linear, shorter; spikes small (1" long) in 4 or 5 dense fascicles, 

 distant along the whole length of the culm ; setEE 6, 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 ; spilces 1 to 3 to 6 {mostly in I terminal 

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

 ious edges; bristles 6, "much longer than the oblong, substipitate achenium; tuber- 

 cle about half the length of the achenium. — Swamp.s, N. Y. (Sartwell), Penn. to 

 Mich. 



17 R. fusoa Roem. & Schult. Culm 3-angled, about 2 f high; las.seiaceov^imin- 

 aie ; smooth ; fascicles alternate, pedunculate ; bracts setaceous, longer than the 

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

 equaling the hispid seta. — ^Wet places, Mass. to N. J., rare. 



