212 TRIANDRIA MONOGYNIA. Scirpil8„ 



2. S. plantacjinus. Linn. sp. pi. ed. Willd. 1. 291. Roltb. 

 gram. 45. t. 15. /. 2. FaA/. c/w//r. /j/. 2. 251 . Retz. Obs. 5. 14. 



Culms culunmar, from two to lour feet high, intercepted. 

 Spike terminal, naked, sub-ey limbic ; scales oblong-, obtuse. 

 Seeds beset with bristles. 



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

 sweet water. 



Root stolon iferous, with thick, spongy, and capillary fibres. 

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

 which is covered with a membranaceous sheath or two ; in- 

 wardly intercepted with transverse, rigid septums, at every 

 inch and quarter, besides numberless, irregular, smaller ones 

 between. Spike terminal, cylindric, two inches long, naked. 

 Scales obpvate, smooth, a little keeled, margins membrana- 

 ceous. Stamens three, with bristles intermixed round the base 

 of the germ. 



3. S.tumidus. R. 



Culms from two to three feet high, round, regularly inter- 

 cepted. 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, the same. Culm erect, three feet high, round, smooth, 

 naked, seemingly swelled, intercepted with a conspicuous 

 transverse partition every sixth of an inch. Leaves none, but 

 sheaths as in the former. Spike single, terminal, erect, cy- 

 lindric, an inch long. Scales broad-lanceolate, acute, a little 

 keeled, otherwise smooth. Stamens, bristles, &c. as in the 

 other species. 



4. S. spiralis. Lmn. sp. pi. ed. Willd. 1. 290. Rottb.gram. 

 45. /. 15./. 1. Vahl.2. 252. 



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

 terminal, naked, cylindric, obtuse. Scales Japped. Seeds 

 feeset with bristles. 



