CYPERACE Jl. 563 



. Pd., iu wet places; Domiuica!, Imr.; Triuidadl, Seh., Loekh. ; [sonthern United States! 

 to Brazil ! ; trop. Africa I and Asia I]. 



^ 5. C. acnminatus, Tour. Annual ; stem low, 3-angular, glabrous ; clusters single or 

 several : involucre long, 3-4-leaved; spikelets ovate or oblong, hlurdish, pale, inany-12- 

 flowered ; glumes ovate-lanceolate, acute with the short point slightly spreading or re- 

 curved, l-S-nerved at the keel, approximate, twice as long as the elliptical, compressed-S- 

 angular, pointed achenium ; furrows narrowly winged; stamen 1. — 3 -8"(-12") high: the 

 stem often only as long as the involucre ; leaves flat ; glumes J'" long. — Hab. Jamaica !, 

 M'Nab; [IlUnois! to Cuba I]. 



6. C. tenuis, Sw. Annual ; stem slender or low, filiform, glabrous ; clusters single or 

 several: involucre of 3 (-6) setaceous-linear leaves; spikelets linear, at length rejlexed, 

 brown, d-i-flowered ; glumes half-ovate, pointed with the short point slightly spreading, 

 9-T-»er»ed, about twice as long as the winged furrow, half as long again as the obliquely 

 elliptical, 3-gonal, slightly dotted acheninm; stamens 3-2. — 4"-8" (2''-12'') high ; leaves 

 setaceous-linear, csespitose ; glumes J'" long. — Hab. Jamaica !, Pd., March, in wet places 

 Westmoreland. 



+ Furrows wingless -or narrowly wmged. 



7. C. confertns, &w. I Rhizoma shbrt; stem obtuse-angled below, glabrous, about as 

 Jong as the leaves ; clusters unequally umbellate, rarely single : involucre long, 3-6-leaved ; 

 spikelets oblong, greenish or greenish-brown, 18-4-flowered ; glumes spreading, elliptical- 

 lanceolate, recurved acuminate, W-T -nerved, 6-4 times as long as the naked furrow, twice 

 as long as the elliptical-oblong, 3-quetrous, pointed achenium ; stamens 3. — Habit of C. com- 

 pressus, L., but stouter, l'-2' high ; leaves narrow, usually channelled; glumes variable in 

 size, li"'-2"' long. — Hab. Jamaica !, Sw., Jl., March, in wet pastures ; Antigua !, 

 Wullschl., [S. Croix 1 ; Venezeula]- 

 -— 8. C. ochraceus, V. Rhizoma short ; stem 3-angular, glabrous ; clusters unequally 

 umbellate, (or " single ") : involucre long, 5-9-leaved ; spikelets oblong, bluntish, yellowish, 

 many-8 -flowered ; glumes spreading, subulate mth a bluntish, incurved-erect point, auricled 

 at the base, obscurely S-1-nerved, 4 times as long as the naked furrow, half as long again 

 as the elliptical, obtuse-angled, pointed, dotted achenium; stamen 1. — SI. t. 75. f. 1. — 

 C. elegans, L. (uou V.), from Sloane's figure, while Linnseus's description refers more to 

 the preceding. — 3-1' high, flat-leaved ; glumes I'" long, at length dotted. — Hab. Jamaica t, 

 Pd., AL, M'Nab, Wils., in wet places; Antigua!, Wullschl.; Trinidad!, Sch. ; [Cuba! jto 

 French islands ! Galapagos !]. 



9. C. -viscosas, Ait. Rhizoma short; stem obtuse-angled below, scabrous, viscous ; , 

 leaves convolute-filif orm ; clusters unequally umbellate : involucre long, 3-5 -leaved; spike- y 

 lets ovate, blunt, greenish-brown, 12-4-flowered; glumes elliptical, mucronate with a short, 

 spreading point, W-l-nerved, approximate, twice as long as the obovate, 3-gonal, smooth 

 acheniunii: furrows naked; stamens 2. — Rottb. Descr. t. Q.f.i. — C. elegans, iJoWi. — 

 3'-2' high; glumes 1'" long. — Hab. Jamaica!, Macf. ; Antigua!, Nichols, Wullschl.; 

 Dominica!, Imr.; Trinidad!; [Cuba! to French islands!, Sieb. Mart. 12; Mexico to 

 Venezuela]. 



10. C. laxus, Lam. Rhizoma short ; stem 3-angular, glabrous; leaves broadly linear, 

 flat; clusters in a compound umbel: involucre long, 6-12-leaved ; spikelets oblong, bluntish, 

 greenish, or greenish-brown, 16-0-flowered; glumes roundish-elliptical, mucronate with a 

 greenish, spreading paint, 5-7-nerved, with a broadly memhrauaceous margin, thrice as 

 long as the naked furrow, half as long again as the elliptical, 3-quetrons, smooth achenium ; 

 stamens 3-2.— C. elegans, F., Mey. / (non i.).— 3'-2'high ; leaves 4"'-2"' broad; glumes 

 f" long.— Hab. Jamaica!, Al., M'Nab, Wattschl., March; Trinidad !, &>«. Tr. 9; [Pa- 

 nama I, Venezuela!, Guiana!, Brazil]. 



11. O. simplex, Kth. Rhizoma short; stem 3-augular, glabrous, usually shorter than 

 or as long as the involucre ; leaves flat ; clusters of 3-5 (-1) diverging spikelets in a 

 simple, lax umbel: involucre long,-5-12-leaved; spikelets oblong-linear, tapenng above, 

 greenish-brown, many(-8-)flowered ; glumes oblong-lanceolate, acuminate with a bluntish,. 

 erect point,. 1-\\-nerved near the middle, 4 times as long as the narrowly winged furrow. 



