North American Cijperacece. 435 



C. LEPTOS, p. 273. New Orleans, (no. 385.) T. Drum- 

 mond ! 



C. INFLEXUS, p. 273. Texas, (without a number,) T. 

 Drummond ! 



Cyperus acuminatus, Totv. S^ Hook. 



Umbel 1 — 2-rayed ; the rays very short ; involucre about 

 3-leaved, very long ; spikelets collected into ovate heads, ob- 

 long-linear, 16 — 20-flowered ; rachis nearly naked ; scales 

 oblong, acute, obscurely 3-nerved, reticulated, somewhat 

 squarrose ; stamen 1 ; nut oblong, triquetrous, acuminate at 

 each end. 



Moot fibrous, annual. Culms cespitose, 3 — 4 inches high, leafy at the 

 base. Leaves narrow, as tall as the culm. Umbel with scarcely dis- 

 tinct rays, appearing almost like an aggregated head of spikelets. In- 

 volucre 5 — 6 times as long as the umbel. Spikelets in heads of 10 — 15. 

 Scales greenish, appearing reticulated, under a lens, the point acute and 

 recurved. Stamen always solitary. Style 3-cleft. Nut gray, dull 

 acutely triangular. 



Hab. Near St. Louis, Missouri, T. Drummond ! (v. s. in 

 herb. Greene.) 



Obs. This species has much the appearance of C. inflexus, 

 but it is easily distinguished by the greater number of florets 

 in the spikelet, and by the form of the scales. In the latter 

 they are cuspidate, much more squarrose, and strongly nerved. 

 I am inclined to think it is the C.Jilicimis of N. ab Esenbeck, 

 who gave this name to a Cyperus in Mr. Drummond's St. 

 Louis collection, and placed it in the same section with C 

 aristatus. It is doubtless a very distinct species from C. Jili- 

 cinus of Vahl. 



C. viRENS, p. 275. New Orleans, T. Drummond.' (no. 

 884.) 



