430 



SUPPLEMENT. 



Cyperus diandrus, p. 252. Burke County, North Ca- 

 rolina, Mr. Curtis! 



C. FLAVicoMUS, p. 253. The rays of the umbel are some- 

 times branched at the summit, the divisions bearing spikelets 

 in a distichous order throughout their whole length. One or 

 two setaceous bracts at the base of the partial rays. Spikelets 

 9 — 30-flowered. v. s i?i herb. Le Conte. 



C. MiCRODONTUS, p. 255. /3. Texensis : Culm slender, 

 obtusely triangular ; leaves very narrow ; umbel simple ; rays 

 3 — 4 ; involucre 3-leaved, very long ; spikelets linear, many- 

 flowered, inserted on all sides of the common rachis, some- 

 what fasciculate ; scales lanceolate, appressed, mucronulate ; 

 stamens 2 ; nut linear-oblong, obtuse ; style deeply 3-cleft ; 

 rachis denticulated with the inner scales. 



Culms cespitose, almost filiform. Leaves shorter than the culm. 

 Rays of the umbel 1 — 2 inclies long, each bearing towards its summit 

 about 30 somewhat spreading spikelets. Involucels 0. Spikelets three- 

 fourths of an inch long, much compressed, narrow, pointed. Scales closely 

 appressed, ferruginous, dull, with a green keel. Nut dark purplish- 

 brown, convex on both sides. 



Hab. Texas, T. Drummond ! (Coll. III. no. 454.) 



Obs. Very near C. microdontns ; but the culm is taller, the 

 leaves much narrower, the spikelets more slender, the scales 

 lanceolate, &c. 



