North American Cyperacea. 381 



glomerata, M'lchx. to Cladium ; but he surely must have mis- 

 taken some other plant for ours. I suspect he meant Schanus 

 mariscoides of Muhlenberg. 



21. HYPOPORUM, N. ah Esenh. 



Perigynium O. Nut naked, triangular at the base ; the 

 sides porous, punctate, or sulcate. — Habit of Scleria. 



Hypoporum, N. ah Esenh. hi Wight's contrih. p. 70, and 

 in Linncea 9. p. 303. 



Species of Scleria, Willd., Nutt., Miihl., &c. 



1. Hypoporum gracile. 



Culm filiform, and witli the leaves, smooth ; spikelets few, 

 in a terminal fascicle ; bracts and scales glabrous ; nut ovate, 

 obtuse, obscurely triangular, smooth, indistinctly ribbed, with 

 two pores on each side of the triangular base. 



Scleria gracilis, Elliott ! sk. 2. p. 557. 



Culm 1 — 2 feet high, very slender, triquetrous, nearly naked. Leaves 

 scarcely half a line wide, 2 — 4 inches long. Spikelets 3 — 5 pairs, 

 closely aggregated, subtended by an erect bracteal leaf 3 — 4 inches 

 long, appearing like a continuation of the culm. Sterile spikelel, sessile 

 within the fertile scales. Stamens 3. Nut about aline and a half long, 

 white, dull ; the sides marked with obtuse longitudinal ribs (which are 

 sometimes rather obscure) and two oblong pits or pores on each side 

 near the base. « 



Hab. Middle Florida, Dr. Cliapnan! ; near St. Mary's, 

 Georgia, Dr. Baldivin ! ; Texas, T. Drtimmond ! 



Obs. Mr. Elliott remarks that the nut is polished, and 

 showing in " some specimens" slight longitudinal ribs ; but I 

 find it to be dull, and almost always distinctly ribbed ; and yet 

 the plant which I have described must be identical with his, 

 since it agrees with specimens collected by Dr. Baldwin him- 

 self. 



