' 564, CYPEKACJSiE. 



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

 Prsl. Reliq. Hank. 1. 1. 31./. 1.— 8"-ia" high (the long rays up the umbel included) ; 

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

 zuela I to Uruguay]. 



y- 12. C. surinamensis, Botti. Bhizoma short; stem 3-angular, scabrous; leaves 

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

 ovate-oblong, blunt, yellowish, many-lO-flowered ; glumes shortly ovate-oblong, Huntish, 

 %-nened, 4-5 times as long as the naked furrow, twice as long as the elliptical-oblong, 3- 

 gonal, pointed, dotted achenium; stamen 1. — Botib. Descr. t. d.f.h. — 0. vegetus, Jfey. 

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

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



-- 13. C. IiuzulsB, iJoiiJ. Perennial; stem 3-angular, glabrous; leaves glaucous, _;?«<; 

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

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

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

 rows naked; stamen 1. — Bottb. Descr. t. 13./. 2. — C. trinitatis, Sleud. ;—%"-'i^' high; 

 glumes f" long. — Hab. Dominica!; Trinidad !, iS«^. 2V. I ; [Carolina!; Panama!, Guiana!, 

 Brazil!]. 



14. C Haspan, L. Khizoma short ; stem 3-angnlar 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, mauy-8-flowered ; glumes 

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

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

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

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

 long. — Hab. Jamaica !, 4^., Wullschl. ; [southern ITnited States ! to Brazil!; trop. Asia! 

 and Africa ! to the Cape], 



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

 and more tardily from the rhachis. 



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

 versely partitioned, aj)hyllous, glabrous ; clusters of spreading spikelets in a simple, or com- 

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

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

 and as the obovate-oblong, 3-gonal achenium ; stamens 3. — 5/. i. 81./. 1. — 3'-4' high, 

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

 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. (». 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, 9-5-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 i"-S" long in dense tufts along the slender, shortly- 

 branched rhizoma ; spilcelet 4"'-2"' long, 4'"-^'" 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, eaulf loose, at length disappearing ; glumes 4'"— |"' long : keel 

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

 Jamaica !, Wullschl., Manchester, at Fairfield. 



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

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



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



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



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



