cYPERus. TRIANDRIA. MONOGYNIA. 63 



lour. Glumes with scarious margins; carina green. Sta- 

 mens 3. Style 3-cleft. Seed oblong, triquetrous, brownish. 

 Hab. In wet sandy places ; on the banks of rivers and on the 

 sea-shore. Common about Bath, on Long-Island. In Penn- 

 sylvania. Muhlenberg. August. 



Allied to C. Hydra of Mi c hau x, which is such a scourge 

 to the planters in the Southern States. 



10. C. compressus L.: spikes digitate, somewhat in 

 fours, lanceolate ; glumes mucronate, broad, membranaceous. 

 Vahl Enum. II. p. 3 24. W il I d. Spec. 1. p. 282, exd, 

 syn, G ron. P ur s h Fl \. p. 51, Elli o 1 1 Sk. ]. p, 65. 

 Muhl. Gram. p. 15.^ Ro em. ^ S chult. II. p. 182. 



Culm 3 — 8 inches high, obtusely triangular. Lea-ves shorter 

 than the culm, linear-lanceolate. S/iikelets nearly sessile, 

 somewhat capitate, oblong-lanceolate, many-flowered (16 — 

 27.) Glumes not mucronate, the carina green ; sides mem- 

 branaceous, nearly white. Stamens 3. Style 3-cleft. E I- 

 lio 1 1. 



Hab In low meadows. Pennsylvania to Carolina. Pursh. 

 This species I insert on the authority above given, though, 

 I believe, no other botanist has observed it in the Northern 

 States. The C.comfiressus of Mu h le nb erg (Gram. p. 15.) 

 differs from that described by Elliott, in having a com- 

 pressed culm, a simple umbel, mucronate glumes, and a 

 2-cleft style. 



11. Cvirens Mich.: culm acutely triangular ; umbels 

 decompound ; spikeiets ovate-lanceolate, in compact heads : 

 involucrum very long. Elliott Sk, I, p. 66. M i c h, FL 

 I. p. 23, Vahl Enum. n. p. 253. P ur s h Fl. ]. p. 5<2. 

 Muhl. Gram. p. 24. R o e m. ^ Schult. II. p. 210. 



Culm 1 — 2 feet high, most acutely triangular; the angles sca- 

 brous near the summit ; sides concave. Leaves linear-lance- 

 olate, somewhat compressed, the margins and midrib ser- 

 rulate, 2 — 3 feet long, 4 — 6 lines wide. S/iikelets commonly 

 16 flowered, laterally appressed into compact heads. Glumes 

 lanceolate, acute. Stamen I ? Style 3-cleft. Seed oblong, 

 triangular. Elliott. 



Hab. In wet meadows and woods. Pennsylvania to Carolina, 

 pursh. 



This, like the preceding species, I insert on the authority of 

 Pursh. 



12. C maris coides Ell.: umbel simple or with I — 2 



rays ; spikeiets collected into globose heads, linear, 7 



8-flowered ; glumes loose, obtuse. Elliott Sk. I. p. 67. 

 Sprtngp.l neue Entdeck. I. p. 239. Scirpus cyperiformif: 

 Muhl. Gram. p. 41. S. cyperiforniis Spreng Mant. II. 

 p, 30. n. 4. Roem. <^ Schult. II. p. 135. Mariscus 



