CYPERACEJE. 573 



7. FUIRENA, Rottb. 



Character of Scirpus, buf 3 scales below the flower (rarely abortive). — Erect, leafy, angu- 

 lar perennials : sheaths ligulate ; spikelets ■usually clustered ; glumes awned, or mucronate. 



63. P. tiiubellata, UoUb. Stem usually glabrous ; sheaths ^-angular, somewhat 

 loosened ; clusters in terminal and axillary umbels : peduncles hispid ; glumes awned, 3- 

 nerved, greenish-brown ; achenium pale, 3-gonal, smooth, supported by 3 obovate S9ales and 

 no bristles.— iZoWi. Bescr. t. 19. /. 3.— a'-several feet high ; leaves 8"'-4"' broad, ilat ; 

 spikelets 2"'-3"' long. — Hab. Jamaica I, all coU. ; Dominica 1, Imr. ; Trinidad !, Sieh., Cr. ; 

 [all tropical countries], 



8. DIPLASIA, Rich. 



Fertile glumes including 4 scales below the flower, lower empty. Stamens 8-6. Ache- 

 nium corky, biconvex, dorsally compressed, mucronate. — Stem stout, angular, leafy ; leaves 

 'fiat, lanceolate-linear, serrulate-scabrous ; spikelets large, subeylindrical, acuminate, brown, 

 S-5-nate in a corymbiform, involucrate, terminal panicle. 



64. D. karatifolia, Rich. — Rudge, Guian. t. 24. — Leaves 2-3' long, 1"-1V' broad ; 

 involucre large ; spikelets 1" long ; style 2-iid, slender. — Hab. Trinidad !, Prf., in woods; 

 [Guiana !, Brazil !]. 



9. CLADIUM, P. Br. 



Sjjikelets few-l -flowered. Glumes devoid of included scales and bristles, lower empty. 

 Style deciduous. Achenium corky, naked. — ^Erect perennials ; sheaths closed below ; spike- 

 lets usually clustered. 



65. C. occidentale, iSc/irat^. Stout; stem obtusely 3-gonal, half terete at the summit, 

 glabrous, leafy ; leaves long, linear-acuminate, concave, serrulate-scabrous ; spikelets dark- 

 brown, ovate-lanceolate, acuminate, i-'a-nate : clusters in an interrupted panicle ; stamens 

 2; style 3(-4)-fid; achenium ellipsoidal, with a blnntish point. — Schoenus Cladium, Sw. — 

 8'-10' high ; spikelets IJ'" long, shining. — ^Hab. Bahamas ! ; Jamaica !, Fd., in maritime 

 bogs ; [Cuba I to Brazil]. 



10. MACH^KINA, V. 



Spikelets few-flowered, compound : lowest special glume empty. Glumes devoid of in- 

 cluded scales, provided with bristles below the flower. Stamens 3. Style 3-fid. Achenium 

 3-gonal, smooth, crowned with a conical beak. — An erect perennial; stem compressed; 

 leaves equitant, distichous, fM, devoid of asperities, except along the edges of the superior 

 sheaths: lowest sheaths open, superior closed below; spikelets brown, in a racemiform 



66. M. restoides, V. Schoenus, 5m>.— 3'-5' high ; leaves rigid, 6"'-8"' broad, lower 

 2'-3' long, superior distant, rapidly decrescent; spikelets 2"' long : peduncles cymose, vari- 

 able in length.— Hab. Montserrat, Dominica !, Imr., S. Vincent !, Guild., on the top of the 

 mountains : [Cuba! to French islands !]. 



11. RHYNCHOSPOKA, X. 



Spikelets terete, or biconvex, few-flowered : lower glumes empty, uppermost usually with 

 imperfect, or S flowers. Flowers usually supported by bristles. Style 2-fid-2-partite, or 

 minutely 'a-dentate. Achenium biconvex, crowned with a beak (the dilated base of the 

 style).— Leafy, erect, mostly perennial sedges. 



Sect. 1. EuRHTNCHOSPOBA. — Flowers supported by bristles. Style 2-fid. Achenium 

 separated from the beak by a broad, transverse joint. 



67 B eephalotes, V. Stem stout, simple, B-angular ; leaves long, flat, scabrous at 

 theniarsin; spikelets pale-brown, lanceolate, in a dense, ovoid, terminal head: mvohicre 

 Inn^ dpftpxed • slumes ovate, mucronate ; achenium obovate, transversely wrinkled, shorter 

 tha^'" led subulate b4k, exceeded by the bristles."-ifc«*. Sescr. t. 20.-Sch<enus, 



fi F 4U 



