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 in herb. Le Conte. 
C. MiCRODONTUS, p. 255. 13. 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 inches 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. microdontus ; but the culm is taller, the 
leaves much narrower, the spikelets more slender, the scales 
lanceolate, &c. 
