North American Cyperacece. S81 
glomerafa, Michx. to Cladium ; but he surely must have mis- 
taken some other plant for ours. I suspect he meant Schoenus 
mariscoides of Muhlenberg. 
21. HYPOPORUM, N. ab Esenb. 
Perigynium O. Nut naked, triangular at the base ; the 
sides porous, punctate, or sulcate. — Habit of Scleria. 
Hypoporum, N. ab Esenb. in Wight's contrib. p. 70, and 
in Linncea 9. p. 303. 
Species of Scleria, TVillcL, Nutt., Muhl., &c. 
1. Hypoporum gracilit. 
Culm filiform, and with the leaves, smooth ; spikelets few, 
in a terminal fascicle ; bracts and scales glabrous ; nut ovatey 
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 spikelet, sessile 
within the fertile scales. Stamens 3. Nut about a line 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. Chapman ! ; near St. Mary^s, 
Georgia, Dr. Baldwin! ; Texas, T. Drummond ! 
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. 
