CYPERACEiE. 565 



/. 2.— C. hexastachyos, Bottb. (non Sw.) C. Hydra, V. C. praemorsus, BocMer. C. spha- 

 celatus, Sieb. Mixt. 359 {non Bottb.). C. olivaris, ?««?.— 6"-12" (-1^') high ; ' glumes 

 ,1J"' long. — Hab. Jamaica!, Pd., Wils., March, a troablesome weed, said to be introduced; 

 S. Kitts!, Els., Antigua!, Wullschl.; Trinidad !, Sie^. ; [United States! to Guiana!, and 

 all tropical and warmer temperate countries of the old world]. 



Z' 18. C. esculentus, L. Rhizoma stoloniferous, bearing subglobose tubers ; stem 3- -yj 

 lingular, glabrous ; leaves flat ; clusters of spreading spilteleta unequally umbellate : involucre ^ 

 3-5-leaved; spi/selets Mneai, pale-brown, or straw-coloured, many (-6) -flowered; glumes fi 

 half -ovate-oblong, blunt, 1-nerved, 3-4 times as long as the winged furrow, twice as long 

 as the obovate-oblong, 3-gonal achenium ; stamens 3. — C. aureus. Ten. C. repens, Ell. 

 C. phymatodes, Milhl. C. gracilescens, R. S. — 1'-2' high ; glumes' I'" long. — Hab. Ja- 

 maica !, March ; [all tropical countries to Italy !, the Cape, and United States !]. 



^ 19. O. brunneus, Sw. Rhizoma short ; stem 3-angular, glabrous ; leaves flat, keeled, 

 glaucous ; clusters or spikes of many diverging spikelets in a simple; or compound, con- 

 tracted, or unequal umbel : involucre long, 3-6-leaved ; spikelets lanceolate-linear, bicon- 

 vex, rusty-brown, 12-3-flowered ; glumes half-ovate, bluntish, 9-11-nerved, thrice as long 

 as the winged furrow, twice as long as the elliptical-oblong, 3-gonal achenium ; stamens 3. 

 — SI. t. 74./. 2, 3 ?. — C. insignis, Eth. {ex Sieb. Trin. 7). C. purpurascens, V. : a broad- 

 leaved form with compressed umbels. C. planirdius. Rich, {ex desir.). — 1'-4' high ; leaves 

 3'"-6"' broad ; glumes li'" long. — Hab. Jamaica !, Pd., on the sandy seacoast ; Antigua !, 

 Wullschl., Dominica !,/»«?■. ; Trinidad!, Sjei./ [Cuba ! to Guadeloupe !] .. 



20. C. sphacelatus, Bottb. Rhizoma short; stem 3-angular, glabrous: one side 

 channelled below ; leaves flat ; clusters or spikes of spreading spikelets unequally umbellate : 

 involucre long, 3-6-leaved ; spikelets linear, tapering above, many-flowered, greenish, mostly 

 •with an oblong, purple blotch along the margin ; glumes half-ovate-oblong, bluntish with a 

 minute point; 5-S-nerved, 4 times as long as the winged'^furrow, 2^ times as long as the 

 elliptical, 3-quetrous achenium ; stamens 3. — C. hexastachyos, Sw. {non Bottb.) C. Bal- 

 bisii, Kth.—8"-2' high ; glumes li"' long.— Hab. Jamaica \,Al., M'Nab ; S. Kitts !, Els., 

 a noxious weed, Antigua I, Wullschl., Dominica I, Imr. ; [Haiti to Brazil !]. 



21. C. distans, L., Sw. Rhizoma short ; stem 3-angular, glabrous ; leaves flat; spikes 

 of spreading spikelets in a large compound (or simple) umbel : involucre long, 8-5 -leaved; 

 sjiilielets linear, 16-8-flowered, irowB, at length pale ; glumes distant, oblong, bluntish, 

 S)-Z-nerved at the convex keel, at length spreading, tuiice as long as the winged furrow, 

 i as long again as the oblong-lanceolate, 3-gohal achenium ; stamens 3. — Bottb. JDescr. i. 

 10.— C. elatus, iSo««.— Stout, 14'-3' high ; glumes f" long.— Hab. Antigua !, WullscKl.; 

 [S. Thomas to Brazil ; trop. Asia !, Australia, and Africa to the Cape]. 



Sect. 4. DiCLiDiuM, Schrad. — Spikelets mbcylindrical : glumes rounded on the back : 

 rliachis jointed, itsfiarows deep, including or embracing the S-angular achenium by its 

 persistent wing or margin. Style Z-cleft. 



* Spikelets in a single, lateral cluster. 



22. C. filiformis, Sw. Rhizoma short; stem slender, striate, 3-angular above, gla- 

 brous ; leaves setaceous-linear, or most abortive ; cluster single, exceeded by one, erect 

 leaf of the 3-1 -leaved involucre; spikelets linear, flexuose, ^-i-flowered, pale, or pale- 

 brown ; glumes oblong, bluntish, ohsoletely many-nerved, twice as long as the furrow, half 

 as long again as the lanceolate-oblong, 3-gonal, dotted achenium : furrows convex on the 

 back; wings membranaceous; stamens 3. — C. havaueusis, W. — i'-3'highj glumes IJ'" 

 long. — Hab. Jamaica!, Pd., Al., March, Wullschl., on grassy hills; [Cuba!, Haiti]. 



** Spikes of approximate spikelets, in a simple or compound umbel. 



23. C. odoratus, L. Rhizoma short ; stem stout, 3-quetrous, glabrous ; leaves 

 broadly linear; spikes in a compound umbel: involucre long, 6-12-leayed; spikelets 

 linear, 12-7-flowered,_pa/^; glumes oblong-lanceolate, bluntish, striate, twice as long as 

 the furrow and as the lanceolate-oblong, convex-3-gonal, included achenium : furrows 

 convex on the back : wings- chai-taceons : stamens 3. — SI. t. 74./. 1. — C. Sanctse Crucis, 

 i(V«)B,>— 2'-sevBriJ feet high; glimies 1^'" long, 2 lowest empty ones broad at the base; 



Kj 



