576 CYPERACE-S!. 



Sect. 5. DiOHKOMENA, V. — No iristles below the flower. Style i-fid. 

 * Spikelets fascicled, or corymiose ; glumes convex, rarely keeled. 



79. R. spermodon, Gr. Stem slender, filiform ; leaves setaceous ; spikelets pale, or 

 pale-brown, lanceolate-acuminate, in terminal and axillary fascicles, exceeded by the sup- 

 porting leaf ; lower glumes elliptical, awned-mucronate, superior lanceolate; achenium 

 greenish-brown, roundish, transversely wrinkled-undulate, i-dentate-emarginate, much 

 longer and broader than the short,' compressed-conical, blunt, blackish beak. — Rottb. 

 Descr. t. %\.f. 2 ; Mart. Fl. Bras. 3. t. 8./. 1. — Scboenus setaceus, Rotti. (Spermodon, 

 F. B., Dichromena, Kth.)—Koat fibrous, at length stoloniferous ; stems 6"-12" high; 

 spikelets 2'!'-3"' long, geminately clustered, or single, often few in the shortly peduncled 

 fascicle. — Hab. Jamaica, Wullschl., in dry pastures-. [Guiana I, Brazil]. 



80. R. filiformis, V. {sec.Klh.). Stem slender, rigid; filiform ; leaves setaceous; spike- 

 lets brown, or pale-brown, lanceolate-linear, acuminate, in simple, terminal, and a few axil- 

 lary cojymi*;' lower glumes elliptical-oblong, awned-mucronate, superior lanceolate-linear ; 

 achenium brown, roundish, slightly scabrous-dotted, truncate, obsoletely ^-dentate, supported 

 by a cuneate disk, much longer and broader than the short, compressed-conical, blunt, 

 blackish «««/!:.— Dichromena, Kth. Spermodon, iVi. /— 8"-15" high; spikelets 5"'-6"' 

 long. — Hab, Trinidad I, Lockh., in sandy savannahs ; [Brazil !]. 



81 . R. cubensis, Gr. Stem filiform, flaccid ; leaves setaceous, channelled ; spikelets 

 pale, or pale-brown, lanceolate-acuminate, in simple, terminal, and a few axillary corymbs; 

 lower glumes ovate, superior lanceolate ; achenium roundish, obsoletely wrinkled trans- 

 versely, supported by a minute disk, much longer than and as broad at the summit as the 

 short beak ; beak greenish, compressed-conical, bluntish, emarginate at the base, shortly 

 decurrent. — Dichromena, Pcepp. : but the achenium is pale in our form. — Nearly allied to 

 (and perhaps a form of) Holoschoinus capillaris, Ns. !, {Dichromena, Kth.), in which the 

 achenium is deeply wrinkled transversely. I'-li'higb; spikelets 2'" long. — Hab. Domi- 

 nica !, Imr. ; [Cuba !, Und. 2069]. 



82. R. micrantha, Y., Frl. Annual; stem flaccid, filiform; leaves linear, flat; 

 spikelets pale, or pale-brown, ovate-roundish, in terminal and a few axillary, divaricate 

 corymbs : pedicels filiform ; glumes few, ovate-lanceolate, bluntish ; achenium pale, or 



yi brown, roundish, transversely wrinkled, margined, thrice as long and broader than the 

 short beak : beak greenish, compressed-conical, pointed, shortly decurrent. — Dichromena, 

 Kth. B. sparsa, iSeV*. Mart. 2591 (Haloschoenus, iVi. .').— 4''-8"(-12") high; leaves 1"' 

 broad; spikelets scarcely 1'" diam. — Hab. Jamaica!, Pd., along ditches; Antigua I, WulUehl., 

 Dominica !, Imr., S. Vincent !, Guild. ; [Portorico 1 and Mexico to Venezuela 1 and Guiana], 

 8.3. R. hirsuta, V. Pilose; stem slender, filiform; leaves narrowly linear, flattish, 

 or convolute ; spikelets rusty-brown, ovate-lanceolate, several-flowered, clustered in ter- 

 minal, and a few axillary, spreading corymbs ; glumes ovate, or ovate-oblong, pointed ; 

 achenium pale, sabglobose, densely reticulated-scrobiculate, broader than the short beak : 

 beak brownish, compressed-conical, pointed, truncate at the not decurrent base. — Dichro- 

 mena, Kth. — 6"-10" high ; leaves 4'" broad ; corymbs 1" diam. ; spikelets \\"'-%"' long. 

 — Hab. Trinidad !, Cr., in savannahs. 



** Spikelets in a terminal, exinvolucrate cluster ; glumes keeled. 



84. R. pusiUa, Gr. Low, csespitose ; leaves incurved, flattish, or convolute, ciUate, 

 about as long as the filiform stem ; cluster terminal, of a few, white, alternating, oblongT 

 lanceolate spikelets : lateral ones as long as their bract ; glumes ovate-lanceolate ; achenium 

 roundish, slightly wrinkled transversely, obtusely margined : beak brown, short, depressed- 

 conical, bluntish, truncate at the base and as broad as the summit of the achenium.^— Sw. 

 Ic. Ind. Occ. t. 6. — Schncnus, Sw. : style wrongly described by Swartz as being 3-fid. 

 Dichromena, Kth. — 1"-3" high ; spikelets approximate, 1'" long ; achenium yellow, or 

 black, — Hab. Jamaica !, Wils., M'Nab, Wullschl., on wooded, rocky hills ; [Cuba !, 

 Guadeloupe I]. 



*** pikelets in a terminal head, included within the often coloured base of 

 the long involucre ; glumes keeled. 



j/ 85. R. stellata, Gr. Wholly glabrous ; rhizoma creeping; stem angular; cluster 



