CYPERACE^. 575 



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

 beak emarginate at the jointed base. 



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

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

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

 ovate, mucronate, superior oblong-lanceolate, acuminate ; achenium rusty, elliptical-oblong, 

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

 dilated at its clasping-emarginate base, little longer thau the achenium, which is exceeded by 

 the scabrous bristles. — Habit of Oyperus longus, and distinguished from Calyptrostylis 

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



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

 flowers single, superior <? ; stamens 3; style exserted, minutely 2-dentate; achenium 1^'", 

 beak 2" long. — Hab. Trinidad !, Pd., 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 

 1-2-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. 21. f. 1. — Schoenus, 

 Rot lb., Sw. R. aurea, V., R. Br.— 2'-4' 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 (Sw.) and Australia (R. 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 ; lowest glume ovate, most lanceolate ; achenium 

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

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

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

 Mart. Ft. 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) 1'" 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. (Pleurostactiys, Brongn). — Flowers supported by denticulate 

 bristles. Style 2-partite ; base thickened. Achenium contiguous with its short beak. — 

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



77. R. millegrana, Schrad. Stout j 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, pale- 

 brown, 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. — 4' high : leaves 10"'-8"' broad; panicles long-peduncled, 3", spikelets 1'" long. — Hab. 

 Trinidad!, Cr. ; [Brazil]. 



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

 nutely 2-dentate 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 jointed with it: beak 

 compressed-conical, grcei ish, one-third as long as the achenium : no bristles. — Schcenus, V. 

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

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

 scrrat, Dominica !, Imr. ; [Cuba! to Venezuela! and Peru]. 



