ORDKR cxLi. — cyperack.t:. 501 



3. I. CAriLLA'Ris, (Roem.) {Scirpus dliatifolins, Kll.) Stan slender, 

 striate. Leaves linear, channelcLl, ciliate. 'Spikex ovato, in compound 

 umbels, with a short involucre. Glumes laiu-cohito. — ©• Sept.— Oct 

 Damp soils. 6 — 8 inches. 



4. I. divakica'ta, (Dietr.) {Scirptis divaricatus, Ell.) Stem t-root, 

 obtusely 3-an<^led, glabrous. Leaves flat, with finely serrulate jnargins, 

 glabrous. ^/yiA:<?.s oval, pendulous, in compound umbels. Glumes ovate, 

 margins white, midrib green. — 2^. May — June. Tine-barrens. 2— 4 ft. 



Genus IX.— FIMBRIS'TYLIS. Vahl. 

 (From Jimhria, a fringe, and stylus, a style.) 



Spikes usually many-flowered. Scales imbricate. Perianth 

 none. Stamens 1 — 3. Sti/les 2 — 3-cleft, with a bulb-like base; 

 achenium lenticular or triangular. 



1. F. autumna'lis, (Roem.) (Scirpus autumnalls, Pursh.) Stem 

 erect, compressed. Leaves linear, flat ; sheath bearded at the throat. 

 Spikes lanceolate, in compound umbels. Glumes lanceolate. — O- 

 Aug. — Oct. Damp soils. Very common. 8 — 12 inches. 



2. F. lax'a, (Vahl.) {Scirpus sulcatus. Ell.) Stem erect, glabrous, 

 terete. Leaves glabrous, serrulate. Spikes ovate-lanceolate, in com- 

 pound umbels ; involucre subulate, small. Glumes membranaceous. — 

 Aug. — Sept. Damp soils. 12 — 15 inches. 



3. F. casta'xea, (Vahl.) {Scirpus castaneus, Mich.) Stem erect, stri- 

 ate. Leaves narrow, erect, rigid. Spikes ovate, in a terminal compound 

 umbel; involucre 2-leaved. Glumes nearly round. — Q. June— July. 



Low country. 



4. F. sPADi'cEA, (Vahl.) {Scirpus spadiccus, L.) Stnus forming a 

 thick tuft. Leaves long, narrow, arranged in two rows. Spikes in com- 

 pound umbels, with the sessile one in the division of the stem ; involu- 

 cre subulate. Glumes nearly orbicular, glabrous. — June to Oct. On the 

 sea-coast. 2 — 3 feet. 



5. F. coarcta'ta, (Sehw.) {Scirpus conrctatus, Ell.) Strm filiform, 

 generally declining. Leaves glabrous, with tiie throat of the sheath 

 bearded. Spikes in a compound umbel ; involucre many-leaved, si-ta- 

 ceous, one of the leaves longer than the rest. Glumes ferruginou.-*, cil- 

 iate. — ®. Sept. — Oct. Dry soils. 10 — 12 inches. 



6. F. ferrugine'a, (Vahl.) {Scirpus fcrrufjineus, L.) Stan erect, 

 compressed, with the angles at the summit scabrou.'^. Leaves coriaceous, 

 with cartilaginous margins ; throat of the sheath ciliate. Spikes in com- 

 pound umbels, with the sessile one in the division of the .'*tem ; involu- 

 cre ciliate. Glumes coriaceous, ferruginous, pubescent and ciliate. — If. 

 June — Oct. In moist places. 1 — 3 feet. 



Tribe III.— RHYNCOSPO'RE^E. 



Flowers perfect or polygamous. Spikes many and f<'W flow 

 ered. Scales distichous' or imbricate, lower one em]»ty. Sta- 

 mens 3 — 6. 



21* 



