31S North Americcm Cyxjcracecb. 



dark brown, smooth and somewhat shining, pointed with the sharp base" 

 of the style. 



Hab. Slow-flowing streams, and ponds, both in fresh and 

 brackish water. Salem, Massachusetts, Dr. Pickering; Tewks- 

 bury pond, near Boston, B. D. Greene, Esq. ! ; Leverett pond, 

 near Amherst, and Deersfield, Massachusetts, Dr. Cootey ^ 

 Profs Hit^chcoch ! f Sand-Lake, near Troy, Mr. H. H. Eaton!; 

 Princeton, Batsto, and Tom's River, New Jersey ! ; Rocky 

 mountains, 7\ Drummond! — August — September. 



Obs. I first received this plant many years ago from Dr. 

 Cooley, of Deerfield, Massachusetts, and described it in the 

 work above quoted. It appears to have a wide range to the 

 north and west, but it has not, to my knowledge, been found 

 south of New Jersey. 



3. SCIRPUS ROSTELLATUSv 



Culm compressed, filiform, sulcate ; spike ovate-lanceolate, 

 acute ; scales ovate, obtuse, loose, somewhat cartilaginous, with 

 a scarious margin ; nut biconvex, very minutely roughened 

 with dots ; the apex discoloured, conical-rostrate, rather obtuse ; 

 bristles 4 — 6, longer than the nut. 



Culm 12 — 15 inches higii, fima and tough, distinctly compressed and 

 deeply striate or sulcate. Spike 3 — 4 lines long, 12 — 15-flowered. 

 Scales a little spreading by the protrusion of the ripe fruit, light brown.- 

 Bristles strong and conspicuously scabrous. Stamens Z'i filaments as 

 long as the nut and unusually broad ; anthers linear-oblong. Style 3- 

 cleft. Nut very convex in front, light brown, shining, but somewhat 

 uneven and roughened under a lens ; the apex discoloured, and at first 

 view appearing like a tubercle. 



Hab. Penn-Yan, Yaies county, New-York, Dr. Sartwell! ; 

 South Carolina, Dr. Walsh ! 



Obs. Nearly allied to S.mdticauUs, Eng. hot. 1. 1187, which 

 Smith (in Engl. Flora, 1. p. 64) and N. ab Esenb. (in Linncea, 

 9. p. 294) refer to Eleocharis, and which some European bo- 



