382 North American Cyperacca. 



Hypoporum Baldwinii. 



Culm triquetrous,- smooth ; leaves linear, carinate ; spikelets 

 about 3, in a terminal fascicle ; bracts and scales glabrous ; nut 

 ovate, obscurely 3-sided, smooth, apiculate ; the base triangu- 

 lar, destitute of pores. 



Culm 2 — 3 feet high, smooth, or sliglitly scabrous on the angles to- 

 wards the summit. Leaves long, narrowly linear, smooth and rather 

 rigid ; the margins minutely scabrous upward. Spikelets about 3, sessile, 

 glomerate in a terminal fascicle, each subtended by a foliaceous bract. 

 Sterile spikelet sessile in the upper fertile scale, many-flowered. Sta- 

 mens 3. Nut (larger than in Scleria triglomerata) white, smooth but 

 dull, obscurely 3-angled, conspicuously apiculate, raised on a" very short 

 triangular base. 



Hab. Georgia, Dr. Baldivin! 



Obs. This species has the habit and general appearance 

 of Scleria triglomerata ; from which, however, it is at once 

 distinguished by its apiculate nut with a dull white surface, 

 the absence of a hypogynium, narrower leaves, fewer and 

 larger spikelets, &c. The particular locality in which Dr. 

 Baldwin found this species Is not recorded. It seems to have 

 been confounded with Scleria triglomerata. 



Hypoporum interruptum, N. ab E. 



Culm triquetrous, and with the leaves, sparsely and minutely 

 hirsute ; fascicles 4 — 6, alternate, sessile, and somewhat distant 

 so as to form an interrupted spike ; scales of the fertile flowers 

 oval or lanceolate, cuspidate, hispid ; nut smooth, subglobose, 

 triangular below, each side furnished with a row of very 

 minute pores. 



H. interruptuni, N. ab Esenb. in Linncea 9. p. 303. 

 Scleria interrupta, Michx. ! fi. 2. p. 167, (not of Willd.?) ; Richard 

 in act. soc. nat. hist. Paris (1792), 1. p. 113. 



