300 Norlh American Cy2}craceie. 



S. glaucus, Torr.; fl. 1. p. 44. 

 S, glaucescens, Willd. 



Culm 1 — 2 feet high, of a soft texture, varying in diameter from filiform 

 to a line and a half. Sjnke 3 — 5 lines long, many-flowered. Scales 

 fuscous in the middle, with a broad scarious and generally lacerated 

 margin. Bristles 3 — 6, overtopping the tubercle, retrorsely scabrous. 

 Stamens 3. Nut compressed, smooth, but dull. Tnhcrcle rostrate- 

 conical, nearly half the length of the nut, which is contracted into ashort 

 neck beneath it. 



Hab, Swamps, and low grounds, from near the Arctic 

 Reo:ions ! to Florida! and from die Atlantic ! to the Pacific 

 Ocean ! 



Obs. a native also of Europe, Caucasus, the East Indies, 

 and the Sandwich Islands. The nut is incorrectly described 

 by Muhlenberg and in my Flora, as " punctate and rugose." 

 The S.glancus of the Flora of the Northern and Middle States, 

 I now believe to be only a variety of S. palustris. 



5. Eleocharis olivacea. 



Culms filiform, (often diffuse) compressed, sulcate, soft ; 

 spike ovate, somewhat obtuse, many-flowered; scales ovate, 

 obtuse, membranaceous ; bristles 6, nearly as long as the nut ; 

 style bifid ; nut obovate, lenticular, dull ; tubercle conical, 

 rostrate, distinct, 



Scirpus interniedius, Gray! Gram. Sf Cyp. part 1. no. 80, (excl. syn.) 

 Ciilms cespitose, often (particularly when growing out of water) diffuse, 

 or subdecumbent, gelierally about a span long, and nearly a line in dia- 

 meter, but sometimes not more than an inch in length, of a soft flexible 

 texture, (as in E.jKdustris), with mucronate sheaths at the base. Spikes 

 3 lines long, 20 — 30-flowered. Scales rather loosely imbricated, one or 

 two of the lowest shorter, and bracteiform ; the others with a narrow 

 scarious margin, reddish sides, and a green midrib. Bristles conspicu- 

 ous, generally 6, retrorsely hispid. Stamens 3. Nut broadly obovate, 

 distinctly compressed, smooth, but not polished, dark olive when ripe. 

 Tubercle rather free round the base, acute, about one third the length of 

 the nut. 



Hab. Wet sandy places, generally partly under water. 



