570 CYPERACE^. 



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

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



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

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

 few-ranked, elliptical-oblong, bluntish ; style i-fid ; achenium, shining broion, obovate, 

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

 third as broad as the achenium. — ^Eleogenns, Ns. Eleocharis sulciculmis, Sieb. Trin. 4! S. 

 caiibseus, P;. Ca«4. — 8"-l"(-l') high: stolons few, tardily appearing ; spikelet l"'-2"'long, 

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

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



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

 knotless: sheat/is pointed; spikelet glohoss-comcal, mang-Jlowered ; glumes many-ranked, 

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



' shorter than the bristles : to5«rc/« small, mam/Zar, «Hacro«a<e, pale. — Sl.t.TS.f.Z. Rottb. 

 Deser. t. 15. y. 3 : a, low form. — Eleogenus, Ns.' Eleocharis, B. Br. { ex parte), Kth. S. 

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

 flowers dense, 50-8Q. — Hab. Jamaica !, Wils., M'Nab ; Antigua I, Wullschl. ; Trinidad !, 

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

 Africa!]. 



47. S. macnlosus, Y. Rhizoma creeping ; stem slender, striate, knotless : sheaths 

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



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

 membranaceous magin ; style %-Jid ; achenium shining -black, obovate-rouudish, minute, 

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

 as broad as the achenium. — Eleocharis, B. Br. — li'-l' high ; spikelet 4"'-5"' long: 

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

 Brazil !]. 



48. S. mitratns, 6r. (». sp.). Rhizoma fibrous, stoloniferons ; 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 i-fld; achenium pale, obovate-roundish, subtrnncate and produced 

 into a tumid ring around the tubercle, constricted at the bise, biconvex, longitudinally 11- 

 \Z-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. palzistris, the achenium larger 

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

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

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

 nium S" 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 cf 



the pith. 



y 49. S. nodulosuB, Mh. 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, bluntish ; style 3-2-fid ; achenium pale, ellipsoidal, biconvex, nearly 

 smooth, ns long as the bristles : tubercle small, mamillar-conical, as broad and long as the 

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

 Kth. I S. geniculatus, Sw. {nan L.) — 1-2' high : partitions of the pith l-ranked : sheaths 

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

 by a minute disk. — Hab. Antigua 1, Wullschl., Dominica !, Inir. ; [Guadeloupe !, Mexico ! 

 to Brazil I]. 



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



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

 cylindrical, or conical-cylindrical, blnnt, bigger than the tapering or constricted summit cf 

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



