ScirpUS. TRIANDRIA MONOOYNIA. S15 



terminal, naked, sub-cylindric ; scales oblong, obtuse. Seeds beset 

 with bristles. 



A leafless, rush-like species ; it grows in shallow standing sweet 



water. 



Root stoloniferous, with thick, spongy, and capillary fibres — 

 Culm erect, round, smooth, naked, except the lower part, which is 

 covered with a membranaceous sheath or two ; inwardly intercepted 

 with transverse, rigid septums, at every inch and quarter, besides 

 numberless, irregular, smaller ones between. — Spike terminal, cy- 

 lindric, two inches long, naked. — Scales obovate, smooth, a little 

 keeled, margins membranaceous. — Stamens three, with bristles in- 

 termixed round the base of the germ. 



S. S. tumidus. R. 



Culms from two to three feet high, round, regularly intercepted. 

 Spike terminal, cylindric. Scales broad-lanceolate. Seeds beset 

 with simple bristles. 



This species is very much like the last described, and a native 

 of similar places, but much rarer. 



Root, fhe same.—Culm erect, three feet high, round, smooth, na- 

 ked, seemingly swelled, intercepted with a conspicuous transverse 

 partition every sixth of ari inch. — Leaves none, but sheathes as in 

 the former. — Spike single, terminal, erect, cylindric, an inch long. 

 —Scales broad-lanceolate, acute, a little keeled, otherwise smooth. 

 — Stamens, bristles, &c. as in the other species. 



4. S. spiralis. Linn. Sp. PL ed. Willd. 1. 290. Rottb. gram. 45. 

 t.lo.f. l.Vahl 2.252. 



Culms from two to three feet high, three-sided. Spike terminal, 

 naked, cylindric, obtuse. Scales lapped- Seeds beset with bristles. 



This is a native of the same places with the last described. 



Root stoloniferous, &.c. as in S. plant aginus.—^ Culm erect, from 

 two to three feet " high, naked, three-sided, angles sharp, smooth, 

 not articulated, nor interrupted invv'ardly. — Leaves none, buta sheath 

 or two embracing the base of the culm. — Spike as in S* plantagi- 



