CYPERACE^. 575 



*.** Spikelets clustered, or fascicled, in a corymb or corymbose panicle ; 

 beak emarginate at the jointed base. 



74. R. Btenorhynclia, Gr. («. «p.) Stout ; stem 3-gonal ; leaves linear, scabrous at 

 the margia and keel: spikelets rusty-brown, lanceolate-acuminate, clustered : clusters in 

 large, erect, compound (or simple) corymbs, usually exceeded by the involucre ; lower glumes 

 ovate, mucronatte, superior oblong-lanceolate, acuminate ; achenium rusty, elliptical-obloni/, 

 or spathulate-oblong, bluntish, transversely wrinkled : beak pale, filiform, tapering, abruptly ' 

 dUated at its elasping-emarginate base, little loiger than the achenium, which, is exceeded by 

 the scabrous bristles. — Habit of Ch/perus longus, and distinguished from Cah/ptrosiylis 

 fascicularis, Ns., by the ripe achenium not " obconical," and deeply wrinkled. 3'-4' high ; 

 corymb slender, usually 4"-8", spikelejs 3"'-4"' long : 3-5 in each cluster ; hermaphrodite 

 flowers single, superior ij ; stamens 3 f style exserted, minutely 2-dentate; achenium IJ'", 

 beak 2'" long. — Hab. Trinidad !, Bd., in wet savannahs. 



75. R. surinamensis, Ns. Stout ; stem sharply 3-gonal ; leaves long, broadly- 

 linear, scabrous at the margin and keel ; spikelets rusty-brown, elliptical-lanceolate, acumi- 

 nate, clustered : clusters in diverging, corymbiform panicles, exceeded by the supporting 

 leaf ; lower glumes ovate, superior ovate-lanceolate ; achenium rusty, obovate, transversely 

 \-%-grooved near the margin, as broad as the emarginate base of the beak : beak brownish, 

 conical, nearly as long or longer than the achenium, with a longitudinal furrow at each 

 side: bristles scabrous, longer than the achenium. — Rottb. Descr. t. 31. f. 1. — Schcenus, 

 Bottb., Sw. R. aurea, F., B. Br.—W-^ high; leaves 6"'-8"' broad: spikelets 2'", ache- 

 nium (without the beak), 1'" long. — Hab. Jamaica {Sw) ; Trinidad!, Cr.; [French islands'.; 

 Panama!, Guiana! ; tropical Asia (Sio.) and Australia {E. -Br.)]. 



76. R. florida, Dictr. Stout ; stem angular ; leaves linear ; spikelets rusty -brown, 

 lanceolate-acuminate, shortly racemose-fascicled, in diverging, simple or compound corymbs, 

 usually nearly as long as the supporting leaf; lowelft glume ovate, most lanceolate ; achenium 

 shining-ockraceous, obovate, obtusely margined, smooth, little broader than the subtruncate 

 base of the beak : beak brownish, compressed-conical, nearlj- as long or longer than the 

 achenium, devoid cf longitudinal furrows : bristles scabrous, longer than the achenium. — 

 Mart. Fl. Bras. 3. t, 13. — Calyptrostylis, Ns. Schcenus longirostris, Sieb. Mart. 261. 

 (R. aurea, var. Schlecht) — 2-6' high ; leaves variable in breadth and asperities, 6"'-2"' 

 broad; spikelets 4'", achenium (without the beak) l"'long. — Hab. Jamaica!, Pd., March, 

 on the summit of the Blue Mountains ; Dominica !, Imr. ; Trinidad !, Cr. ; [Cuba ! to Vene- 

 zuela ! and Guiana], 



Sect. 3. NoMOCHLOA, P. B. (Pleurostachys, Brongn). — Flowers supported by denticulate 

 bristles. Style Z-pariite ; base thickened. Achenium contiguous with its short beak. — 

 Spikelets in terminal, and axillary, peduncled corymbs or panicles. 

 . 77. R. millegrana, Schrad. Stout; stem 3-quetrous, usually devoid of asperities 

 (except the peduncles) ; leaves long, lanceolate-acuminate, puberulous, or glabrate; panicles 

 short, deltoid ; branches compound, iuferior gradually more distant ; spikelets small, fik- 

 hrown, elliptical, blunt, shortly spicate; glumes ovate; achenium rusty, ovate-roundish, 

 smooth, as long as the few (3-4) bristles : beak shortly compressed-conical. — Nemochloa, 

 Ns.—i' high: leaves 10"'-8"' broad; panicles long-peduncled, 3", spikelets 1'" long.— Hab. 

 Trinidad!, dr.; [Brazil]. 



Sect. 4. Mitkospoha, Ns. — Bristles below the flower none (or " abortive "J. Style mi- 

 nutely Edentate at the filiform summit. 

 78. R. polyphylla, V. Stout, or slender; stem 3-gonal, leafy; leaves linear; pani- 

 cles axillary, and terminal, diverging, short, deltoid; spikelets straw-coloured, or pale-brown, 

 lanceolate-acuminate, several-flowered, in short spiciform racemes ; lower glumes ovate 

 superior lanceolate; achenium rusty -brown, ovate-roundish, longitudinally striate, and 

 minutely tubercled, as broad at the truncate summit as the beak and jomted with it: beak 

 compressed-conical, greei ish, one-third as long as the achenium : no bristles.— Schoewis, F. 

 Mitrospora, Ns. R. ferruginea, Sieb. Mart. 9 !-2'-4' high ; leaves 2"'-4"' broad; panicles 

 numerous, 3"-4", spikelets 2'" long.— Hab. Jamaica !, all coU., m the mountains ; Mont- 

 serrat, Dominica !, Imr. ; [Ouba ! to Venezuela ! and Peru]. 



