ORDER CXLI. CYPERACE^E. 561 



3. I. capilla'kis, (Roem.) (Scirpus ciliatifolias, Ell.) Stem slender, 

 striate. Leaves linear, channeled, ciliate. Spikes ovate, in compound 

 umbels, with a short involucre. Glumes lanceolate. — %. Sept. — Oct. 

 Damp soils. 6 — 8 inches. 



4. I. divarica'ta, (Dietr.) (Scirpus divaricatus, Ell.) Stem erect, 

 obtusely 3-angled, glabrous. Leaves flat, with finely serrulate margins, 

 glabrous. Spikes oval, pendulous, in compound umbels. Glumes ovate, 

 margins white, midrib green. — If. May — June. Pine-barrens. 2 — 4ft. 



Genus IX.— FIMBRIS'TYLIS. Vahl. 

 (From fimbria, a friDge, and stylus, a style.) 



Spikes usually many-flowered. Scales imbricate. Perianth 

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

 achenium lenticular or triangular. 



1. F. autumna'lis, (Roam.) (Scirpus autumnalis, Pursh.) Stem 

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

 Spikes lanceolate, in compound umbels. Glumes lanceolate. — 0. 

 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'nea, (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. — (|. June— July. 

 Low country. 



4. F. spadi'cea, (Vahl.) (Scirpus spadiceus, L.) Stems 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 

 6ea-coast. 2 — 3 feet. 



5. F. coarcta'ta, (Sehw.) (Scirpus coarctatus, Ell.) Ste?n filiform, 

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

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

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

 iate. — 0. Sept. — Oct. Dry soils. 10 — 12 inches. 



6. F. ferrugine'a, (Vahl.) (Scirpus ferrugineus, L.) Stem erect, 

 compressed, with the angles at the summit scabrous. Leaves coriaceous, 

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

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

 cre ciliate. Glumes coriaceous, ferruginous, pubescent and ciliate. — 2f. 

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



Tribe III.— RHYNCOSPO'RE^E. 



Flowers perfect or polygamous. Spikes many and few flow- 

 ered. Scales distichous or imbricate, lower one empty. Sta- 

 mens 3 — 6. 



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