572 CYPERACE^. 



3(-3)-fi(l; acheninm brown, obovate, flat-convex, 'kechi on the back, nearly smooth or. 

 slightly rugose.— P. B. Fl. Omar. t. 81. /. 1.— Isolepis, P. B. Embristylis, Kth.^~ 

 6"-12" high ; leaves 2"-4" long, 1"'-14"' broad j spikelets li'" long; stamens 2.— Hab. 

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



+tt -Achenmrn biconvex; style flatfish, ciliate, 2^<? (Eufimbristylis), 



57. S. ferrugineuSj L. Perennial, rigid ; stem snbcompressed ; 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. 77. f. 2. — Embristylis, V. 

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

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

 Cape] . 



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

 filiform, comvohite-channelled ; cyme terminal, usually compound-umbelliform ; spikelets 

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

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

 densely striate.— SI. t. 76./. 2.— Kmbristylis, F.— 2-3' high ; spikelets 6"'-8"'(-3"') long, 

 —Has. 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 ; spilcdets 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, — 

 F. laxa, V. S. annuus, PI. Carih. : AUione's species has a roundish acheninm, and 3-2 

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

 places ; Antigua !, WuUschl., Dominica 1, S. Vincent I, Guild. ; Trinidad !, Sieh. Tr. 5, Cr., 

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



Sect. 4. Ohcostths, Mart. — Achenium crovmed with the persistent, thickish base of the 

 style : no bristles. — Habit of Kmbristylis. 



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

 sefaceous-flliform : 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, S-gonal, obovate, transversely wrinkled: tuber- 

 cle minute, mamillar. — Budge, Gman. f. 22.— Isolepis, B. S. Kmbristylis, As. Gr. S. te- 

 nuifolius, Budg. (Kmbristylis, Ns.). — About 6"-8" high, variable; spikelets 2'" long, — 

 Hab. Antigua!, WitllscM., Domimca. \, Imr. ; [all tropical countries to United States ! and 

 Transcaucasia]. 



61. S. jnncoides, W. Perennial, caespitose ; stems slender, angular ; ^savas 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, S-gonal, obovate, nearly smooth ; tubercle veiy 

 minute. — Isolepis junciformis, Kth. — I'-l^' high, spikelets IV" long, often all clustered.— 

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



6. HBMICARPHA, 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, cffispitose annuals ; stems capittary, 

 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- 



