570 CYPERACE.E. 



high; spikelet 2'" long; glumes purple, pale at the margin ; filaments 2-3, long, persistent. 

 — Hab. Trinidad !, Cr., in savannahs; Mexico I to Venezuela !, Fendl. 1585]. 



45. S. ocreatus, Gr. Rhizoma fibrous, stoloniferous ; stems low, striate, knotless : 

 sheaths loose, membranaceous, pointless ; spikelet ovate-oblong, 5 -15 -flowered ; glumes 

 few-ranked, elliptical-oblong, bluntish; style 2-fid ; achenium shining brown, obovate, 

 biconvex, smooth, nearly as long as the bristles : tubercle small, conical, pointed, about one- 

 third as broad as the achenium. — Eleogenus, Ns. Eleocharis sulciculmis, Sieb. Tnn. 41 S. 

 caribeeus, PI. Carib.— 8"-l"(-l') high: stolons few, tardily appearing ; spikelet l'"-2'"long, 

 usually pale : lowest glume one-half or one-third as long. — Hab. Jamaica !, Wullschl. ; 

 Trinidad !, Sieb. ; [Cuba ! to Brazil !]. 



46. S. capitatus, L., Cliff, (non Sp. Plant.).— Root fibrous, annual ; stems striate, 

 knotless: sheaths pointed; spikelet globose-conical, many-flowered ; glumes many-ranked, 

 oval-roundish, blunt; style 2-fid; achenium shining-brown, obovate, biconvex, smooth, 

 shorter than the bristles : tubercle small, mamillar, mucronate, pale. — SI. t. 75./. 2. Rottb. 

 Descr. t. 15./ 3 •. a low form. — Eleogenus, Ns. Eleocharis, R. Br. (ex parte), Kth. S. 

 geniculate, L. {ex parte). — Usually 1' high, or lower ; spikelet, 2" long, pale, or variegated : 

 flowers dense, 50-80.— Hab. Jamaica !, Wils., M'Nab ; Antigua !, Wullschl. ; Trinidad !, 

 Pd., Cr., Lockh.; [Louisiana! and Cuba! to Brazil!; trop. Asia!, Australia!, and 

 Africa !]. 



47. S. maculosus, V. Rhizoma creeping ; stem slender, striate, knotless : sheaths 

 membranaceous at the lacerate, pointless top ; spikelet elliptical-oblong, pointed, many- 

 flowered ; glumes many-ranked, ovate-oblong, blunt, brown-purple within the whitish, 

 membranaceous magiu ; style 2-fid; achenium shining-black, obovate-roundish, minute, 

 turgid-biconvex, smooth, half as long as the bristles ; tubercle conical, bluntish, pale, halt 

 as broad as the achenium.— Eleocharis, R. Br.—\\'-V high; spikelet 4"'-5'" long: 

 flowers about 30; lowest glume l\'"-2 m long. — Hab. Caribbean islands ; [Guadeloupe ! to 

 Brazil !]. 



48. S. mitratus, Gr. {n. sp). Rhizoma fibrous, stoloniferous; stem slender, striate, 

 knotless : sheaths obliquely truncate, or pointed, appressed ; spikelet cylindrical, many- 

 flowered ; glumes 5-3-rauked, ovate-oblong, blunt, herbaceous with a membranaceous margin, 

 lowest clasping; style 2-fid; achenium pale, obovate-roundish, subtruncate and produced 

 into a tumid ring around the tubercle, constricted at the base, biconvex, longitudinally 11~ 

 lS-costate on each side, twice as long as the bristles : tubercle compressed, bluntly conical, 

 nearly half as long as the achenium, deciduous. — Habit of S. palustris, the achenium larger 

 than in the allied S. nodulosus ; stem cylindrical, 2-1' high : partitions of the pith approxi- 

 mate, several-ranked: sheaths purple; spikelet 8" '-16'" long; glumes about 1" long, 

 variegated, greenish on the convex, substriate back, purple along the whitish margin ; ache- 

 nium f " long ■. ribs prominent, obtuse, transversely rugulose : tubercle brownish : bristles 

 usually 6, unequal. — Hab. Trinidad !, Cr., in savannahs. 



** Stem terete, knotless, but divided internally by distant, transverse partitions of 



the pith. 



49. S. nodulosus, Rth. Rhizoma creeping ; stem slender, terete, striate, knotless : 

 pith distantly partitioned ; uppermost sheath mUcronate ; spikelet conical-cylindrical, 

 pointed (or bluntish), many-flowered ; glumes many-ranked, membranaceous, flattish, ovate- 

 lanceolate, or ovate, bluutish ; style 3-2-fid ; achenium pale, ellipsoidal, biconvex, nearly 

 smooth, is long as the bristles •. tubercle small, mamillar-conical, as broad and long as the 

 constricted summit of the achenium. — Eleogenus, Ns. Eleocharis, Schult. E. cousanguinea, 

 Kth. J S. geniculate, Sw. (non L.)—V-2' high : partitions of the pith 1-ranked : sheaths 

 purple ; spikelet 8"'-3'"(-16'") long ; glumes rusty-variegated ; achenium I'" long, supported 

 by a minute disk. — Hab. Antigua !, Wullschl., Dominica !, Imr. ; [Guadeloupe !, Mexico . 

 to Brazil !]. 



*** Stem terete, thickish, knotted by distant, transverse partitions of the pith. 



50. S. constrictns, Gr. Stem terete, thickish, knotted : sheaths truncate ; spikelet 

 cylindrical, or conical-cylindrical, blunt, bigger than the tapering or constricted summit of 

 the stem ; glumes many-ranked, membranaceous, ovate, blunt, lowest herbaceous within the 



