OKDKIi CXLI. CYl'EKACKJi:. 550 



9. E. genicula'ta, (Brown.) Culm terete. Spikea solitary, cylindri- 

 cal; scales convex, obovate-spatulatc, obtuse. Sctcel. — Carolina and 

 northward. Sea-i-hore. 



10. E. quadrangula'ta, (Brown.) {Scirpzis quadraiafnlatus, Midi.) 

 Stem quadrangular, glabrous, with the sides unequal, s'heathed at the 

 "base. Spike cylindrical. Glumes nearly orbicular, with ferruginous 

 margins, i^r/i-^/cs 3, setaceous. — If. April— May. In swamps. 1 — 2 ft 



Genus V.— SCIR'PUS. Beau. 'i—l. 

 (From the Celtic cirs, rushes.) 



Glumes imbricating- tlie spike on all sides, one or two of tho 

 outer ones occasionally without flowers. Palece none ; spikes 

 having involucral leaves. Seed 1, with bristles at its base. 

 Sheaths usually leaf-bearing. 



1. S. pusil'lus, (Vahl.) (5. capillaceus, Mich.) Slem erect and pro- 

 cumbent, slightly furrowed, with a sheath surrounding its base. Leaves 

 none. Glumes acute. Seed compressed, obovate, with 6 bristles at the 

 base. — 0. March — June. 1 — 3 inches. 



2. S. deb'ilis, (Muhl.) Ste77i erect, triangular, glabrous, sheathed at 

 the base. Spikes 3, ovate ; involucre long, erect. Glumes mucronate, 

 ovate, membranaceous. — 2^. Aug. — Sept. Upper districts Carolina 

 and Georgia. 12 — 18 inches. 



3. S. pun'gens, (Vahl.) (S. Amcricanus, Pers.) Stem erect, trian- 

 gular, glabrous, sheathed at the base. Spikes 6 — 8, ovate, sessile. 

 Glumes ferruginous, ovate. Bristles pilose. — IC. Through tiie sum- 

 mer. Very common. 2 — 3 feet. 



4. S. lacus'tris, (L.) Stem erect, stout, glabrous, striate. Spikes nu- 

 merous, forming an umbel ; involucre 2-leaved, unequal. Glumes lan- 

 ceolate, ciliate. Bristles 6, retrorsely aculeate. 



5. S. marit'imu.s, (L.) Stem erects 3-angled. Leaves very long, gla- 

 brous, chiumeled. Spikes arranged in a leafy panicle ; some sessile, 

 others pedunculate, large and ovate. Ghones nuicroiiate, toothed at 

 the summit, with the midrib extending into an awn. — 2^. May — June. 

 In salt-water marshes. 3 — 4 feet. 



6. S. ERiopii'oRUM, (Mich.) (Trichophorum ct/periuvi, Per.-j.) Culm 

 obtusely triangular, leafy ; panicle dec<)mj)Osecl, proliferous, noilding. 

 JjCaves 1 — 2 feet, linear; sheaths very long, margin brown. Bristles 

 6, exserted when the fruit is ripe. — Borders of swamps and mea-low.^ 

 4 — 5 feet, 



'7. S. exalta'tus, (Pursh.) {Scirpus polijp/n/llus, Vahl.) Stem ob- 

 tusely 3-apgled. Leaves long, glabrous, tinely si-irulate. Sjiikes ovate, 

 cluster(;>i, in a compound umbel. Involucre manydeavcd, long«r than 

 the umbi'l ; invulucel short. 



Var. S. vivip'auus. Stem tall, somewhat climbing. Umbels vivipa- 

 rous, biaring flowers at the base of the brant-he.-^. — U- J"'.^ — /\ugu.-*f. 

 In shady woods. 2 — 10 feet. 



8. S. linb:a'tus, (Mich.) Slem triangular, leafy, glabrous. Loirrs 

 lanceolate, channeled, finely serrulate. Spikes ovate, in axilbiry um- 

 bels. Glumes ferruginous, with the nudrib green.— l^. June— Aug. 

 Pine-barrens. 2 — 3 feet. 



