572 CYPERACE.E. 



3(-2)-fid ; achenium brown, obovate, flat-convex, keeled on the back, nearly smooth or 

 slightly rugose.— P. B. Fl. Owar. t. 81. /. 1.— Isolepis, P. B. Fimbristylis, Kth.— 

 6"-12" high ; leaves 2"-4" long, V"-\\'" broad ; spikclets H"' long; stamens 2.— Hab. 

 Antigua!, Wullschl., on the sea-shore ; [Brazil; trop. Africa to the Cape]. 



fft Achenium biconvex ; style flatfish, ciliate, 2-fid (Eufimbristylis). 



57. S. ferrugineus, L. Perennial, rigid ; stem subcompressed ; leaves narrow, chan- 

 nelled ; cyme terminal, umbelliform or compound; spikelets pedicellate, rusty, ovate- 

 conical ; glumes roundish-ovate, mucronate, pubescent on the back ; stamens 3 ; style 2-fid, 

 flat, ciliate ; achenium pale, obovate, biconvex, smooth. — SI. t. 11. f. 2. — Fimbristylis, V. 

 — li'-2' high ; spikelets 4'" (-6'") long. — Hab. Jamaica !, Pd., on watercourses ; Autigua !, 

 Wullschl., on the seashore ; Trinidad ! ; [all tropical countries to Bueno3 Ayres and the 

 Cape]. 



58. S. spadiceus, L. Perennial, rigid; stem subcompressed-trigonal ; leaves long, 

 filiform, convolute-channelled ; cyme tenniual, usually corapound-umbelliform ; spikelets 

 pedicellate, shining-blackish, subcylindrical or ovate, pointed ; glumes broadly ovate, mucro- 

 nate, glabrous ; stamens 3 ; style 2-fid, flat, ciliate ; achenium brown, obovate, biconvex, 

 densely striate.— St. t. 76./. 2.— Fimbristylis, V.— 2-3' high ; spikelets 6"'-8'"(-3'") long, 

 — Hab. Jamaica!, Pd., March, on rivers and the seashore; Antigua!, Wullschl. ; [United 

 States ! to south Brazil !]. 



59. S. brizoides, Sm. Perennial, slender ; leaves linear, flat, scabrous-ciliate, exceeded 

 by the compressed stem ; cyme terminal, umbelliform ; spikelets pedicellate, rusty-variegated, 

 ovate-conical; glumes ovate, mucronate, glabrous; stamens l(-2) ; style 2-fid, flat, ciliate; 

 achenium pale, obovate, biconvex, 6-S-costate on each side and transversely striate. — 

 P. laxa, V. S. anuuus, PI. Carib. : Allioue's species has a roundish achenium, and 3-2 

 stamens. 6"-18" high ; spikelets 3"'-2'" long. — Hab. Jamaica!, all coll., common in wet 

 places; Antigua!, Wullschl., Dominica !, S. Vincent !, Guild.; Trinidad !, Sieb. Tr. 5, Cr., 

 Sch., in savannahs ; [United States to Brazil !]. 



Sect. 4. Oncostylis, Mart. — Achenium crowned with the persistent, thickish base of the 

 style : no bristles. — Habit of Fimbristylis. 



60. S. capillaris, L. Annual, csespitose ; stems angular, setaceous ; leaves rosulatc, 

 setaceous-filiform : sheath ciliate above or glabrescent ; cyme terminal, unequally umbelli- 

 form ; spikelets brown, ovate-oblong or ovate, bluntish ; glumes ovate, keeled, bluntish ; 

 stamens 1-2 ; style 3-fid ; achenium pale, %-gonal, obovate, transversely wrinkled : tuber- 

 cle minute, mamillar.— Budge, Guian. t. 22.— Isolepis, B. S. Fimbristylis, As. Gr. S. te- 

 nuifolius, Budg. (Fimbristylis, Ns.).— About 6"-8" high, variable; spikelets -2'"<flrong.— 

 Hab. Antigua!, Wullschl., Dominica!, Imr.; [all tropical countries to United States ! and 

 Transcaucasia]. 



61. S. juncoides, W. Perennial, csespitose ; stems slender, angular ; leaves rosulate, 

 setaceous-filiform: sheath loose, densely ciliate above: cyme terminal, contracted ; spike- 

 lets clustered, brown, ovate-lanceolate, pointed ; glumes ovate-lanceolate, mucronate ; sta- 

 mens 2 : style 3-fid ; achenium pale-brown, %-gonal, obovate, nearly smooth : tubercle very 

 minute. — Isolepis junciformis, Kth. — V-\\' high, spikelets IV" long, often all clustered. — 

 Hab. Trinidad!, Lockh. Cr., in savannahs; [Cuba! to Brazil]. 



6. HEMICARPHA, Ns. 



Character of Scirpus, but a single scale in the axils of the fertile glumes below the flower. 

 Achenium naked : style 2(-3)-fid, deciduous. — Low, csespitose annuals ; stems capillary, 

 with a short leaf at the base ; spikelets clustered (or single) : cluster apparently lateral. 



62. H. subsquarrosa, Ns. Clusters of 3-2, ovate, many-flowered spikelets, ex- 

 ceeded by the bract (the lower involucral leaf) ; glumes pale-brown, lanceolate with a spread- 

 ing or recurved point ; stamen 1 ; achenium oblong, subterete, bluntish, pale, exceeding the 

 interior scale. — Mart. Fl. Bras. 3. t. 4. /. 1.— Scirpus, Muhlenb. Isolepis, Schrad. — 

 3"-6" high ; spikelets 2"'-l'" long.— Hab. Trinidad !, Cr.; [Illinois ! to Brazil !]. 



