:jVLicmmu TRIANDRIA. MONOGYNIA. 59 



Bost. p. 14. SciRPUs spathaceus M i c h. Fl. I. p. 32. Cyp. 



racemis lateralibus, &c. Gron. Virg. \3l, Pluk, Jim. 



179. t. 301. f. 1. 

 Root perennial. Culm about 18 inches high, terete below, ob- 

 tusely triangular above. Leaves linear, flat, 2 — 3 inches long, 

 spreading almost horizontally in three directions. Sheaths or 

 stipules {ochrex) cylindric, embracing the culm on all sides. 

 Racemes oblong, simple or compound, on peduncles issuing 

 from the sheaths of the leaves. Sjiikelets 6 — 7-flowered. 

 Glumes lanceolate, very acute. Stamens 3. Style 3-cleft. 

 Seed oblong, triangular. Bristles 6—9, (16 Fa hi.') re» 

 trorsely hispid, longer than the seed. 

 Hab. In swamps and along the borders of ponds ; common. 

 August — September. Near New-York it js generally found 

 in the vicinity of salt water. 



The D. canadense olPersoon {Syn. I. p. 65.) I suspect 

 is only a variety of this species, 



39. CYPERUS. L. 



Spikelets compressed, distinct. Glumes imbricated 

 in two rows. Corolla 0. Style deciduous. Seed 1, 

 naked. Gen. pi 93. Nutt. Gen. I. p. 34. J u s s, 

 p. 27. R. Brown Prod. I. p. 50. Roem. ^ 

 Schult. Gen. 183. Lam, III, t. 38, Nat. Ord. 

 CyPEROiDE^ Juss, Cyprus-grass. 



1, C. infiexus M uhl.: umbel 2 — 3-rayed, or conglom- 

 erated and simple ; involucrum 3-leaved, very long ; spike- 

 lets collected into ovale heads, oblong, 8-flowered ; glumes 

 squarrose at the tip. Muhl. Gram. p. 16. C uncinalus 

 Pursh Fl.\. p. 50. C, Purshvi Bo em. i^ Schult. II. 

 p. 177. 



Root fibrous, biennial ? Culm 2-~3 inches high, leafy at the 

 base. Leaves linear, flat, equalling the culm. Umbel sessile, 

 or on peduncles 3 — 5 lines long. Heads consisting of from 12 

 to 20 spikes densely conglomerated. Involucrum foliaceuus ; 

 one of the leaves three times the length of the umbel, carinate. 

 Sfiikelets linear-oblong, compressed, generally 8-flowered. 

 Glumes ovate, acuminate, mucronate, with the puints recurved, 

 strongly 7-nerved, smooth, yellowish-green. Rachis quadran- 

 gular, compressed. Stamen 1. Style 3-cleft. Seed trique- 

 trous, ovate-oblong. 

 Hab. Banks of rivers. On Otter-creek, Vermont. Dr. Jarnes. 

 On the banks of the Connecticut River. Dr. Coo ley and 

 Mr. Hitchcock. Near Albany, New-York. Mr. Trac y. 

 In the vicinity of Cambridge, in the same State. Dr. Ste- 

 venson. On Lake Champiain. Pursh, In Pennsylvania, 

 Muhl en b er^. August — September. Plant odorous. 



