564 CYPERACE^. 



thrice as long as the truncate-obovate, subglobose-3-gonal, dotted achenium; stamen 1. — 

 Prsl. Reliq. Hank. l.t.Zl.f. 1 — 8"-12" high (the long rays up the umbel included); 

 leaves 2'" broad ; glumes 1"' long. — Hab. Trinidad!, Pd., Lockh.; [Panama and Vene- 

 zuela ! to Uruguay]. 



12. C. surinamensis, Rottb. Rhizoma short; stem 3-angular, scabrous; leaves 

 flat; clusters dense, unequally umbellate: involucre long, 6-3 -leaved; spikelets oblong, or 

 ovate-oblong, blunt, yellowish, many-10-flowered ; glumes shortly ovate-oblong, bluntish, 

 S-nerved, 4-5 times as long as the naked furrow, twice as long as the elliptical-oblong, 3- 

 gonal, pointed, dotted achenium; stamen 1. — Rottb. Descr. t. 6./. 5. — C. vegetus, Mey. 

 Esseq. ! (non W.).—l'-2' high; leaves li'"-l'" broad; glumes i'" long.— Hab. Trinidad !, 

 Sieb. Tr. 8; [Portorico and Mexico to Brazil !]. 



13. C. Iiuztdse, Rottb. Perennial; stem 3 angular, glabrous; leaves glaucous, flat; 

 clusters very dense, subglobose-ovate, in a short umbel: involucre very long, 6-12-leaved; 

 spikelets ovate, blunt, pale, 12-4-flowered; glumes oblong-lanceolate, bluntish, Z-nerved, 

 approximate, twice as long as the elliptical-oblong, 3-gonal, pointed, dotted achenium : fur- 

 rows naked; stamen I.— Rottb. Descr. t. 13./. 2.— C. trinitatis, Steud. ,— 8"-2£" high; 

 glumes £"' long.— Hab. Dominica !; Trinidad !, Sieb. Tr. 1 ; [Carolina!; Panama!, Guiana!, 

 Brazil!]. 



14. C. Haspau, L. Rhizoma short ; stem 3-angular above, glabrous ; leaves none 

 or few and short ; clusters of 3-7, diverging spikelets in a simple or compound umbel : in- 

 volucre short, 2-leaved ; spikelets oblong-linear, bluntish, brown, many-8-flowered ; glumes 

 oblong -linear, mucronate with a short, erect point, B-nerved, 4 times as long as the naked 

 furrow, and as the minute, ovoid-3-gonal, dotted achenium; stamens 3. — Rottb. Descr. t. 

 6./. 2 ; t. 17./. 3 : the latter is the common, aphyllous form, in both figures the involucre 

 is more than usually developed. — C. autumnalis, V. — 8"-3' high, very variable ; glumes \ 

 long.— Hab. Jamaica !, A I., Wullschl. ; [southern United States! to Brazil! ; trop. Asia! 

 and Africa ! to the Cape]. 



ft Furrows winged : wing membranaceous, at length separating from its glume, 

 and more tardily from the rhachis. 



15. C. articulatus, L. Rhizoma stolon iferons, knobbed ; stem cylindrical, trans- 

 versely partitioned, aphyllous, glabrous ; clusters of spreading spikelets in a simple, or com- 

 pound umbel : involucre reduced, scaly ; spikelets liuear, acuminate, brown, many-flowered ; 

 glumes oblong -lanceolate, bluntish, 1-5-nerved, 3-4 times as long as the winged furrow 

 and as the obovate-oblong, 3-gonal achenium ; stamens 3. — SI. t. 81./. 1. — 2'-4' high, 

 variable in the validity of the stem, the colour of the glumes, and (like all other species) in 

 the size of the inflorescence and spikelets; glumes 1^'" long. — Hab. Jamaica !, March ; 

 Antigua !, Wullschl. ; Trinidad !, Cr. ; [all tropical countries to Egypt !, the Cape, and 

 southern United States]. 



16. C. trichodes, Gr. (n. sp.) Rhizoma creeping, knobbed; stem low, setaceous, 

 glabrous, flexuose, exceeding the recurved, setaceous leaves ; spikelet single, lateral, linear, 

 acuminate, brown, 16-4 -flowered; glumes ovate-lanceolate, bluntish, $-5-nerved, thrice as 

 long as the winged furrow, twice as long as the obliquely obovate-oblong, 3-gonal achenium ; 

 stamens 3. — Habit of Scirpus setaceus, but all glumes regularly distichous -, stem almost 

 hair-like, 4"-8" long, its summit (replacing, as in C. mucronatus, the involucre) l"-2 

 long beyond the spikelet; leaves £"-3" long in dense tufts along the slender, shortly- 

 branched rhizoma ; spikelet 4"'-2'" long, £"'— £'" broad, compressed : 2 lowest glumes 

 empty, or the lowest transformed into a short, setaceous bract : wings of the furrow about 

 as broad as the rhachis, early loose, at length disappearing ; glumes 4"'~~ 4 '" l° n & : ^ 

 greenish, 3-nerved ; stamens included ; style filiform, 3-fid above the middle. — Hab. 

 Jamaica!, Wullschl., Manchester, at Fairfield. 



17. C. rotundus, L. Rhizoma stoloniferous, bearing ovoid tubers ; stem 3-angular, 

 glabrous ; leaves flat ; clusters or short spikes of spreading spikelets unequally umbellate : 

 involucre 3-5-leaved ; spikelets linear, acuminate, brown, many-flowered ; glumes half- 

 ovate, bluntish, few-neroed at the green keel, 4-5 times as long as the winged furrow, 

 thrice as long as the ubovate-oblong, 3-gonal achenium ; stamens 3. — Rottb. Descr. t. 14. 



