34 C. B. CrArke: 
trigonis, a nodis inter sese 10—15 mm. distantibus in sicco pseudo- 
articulatis; foliis 0, vagina summa in altero latere producta sca- 
rioso-colorata rarissime viridi; umbellae radiis 10, usque ad 5—15 cm. 
longis; bracteis 1—2 cm. longis, ovatis aut triangularibus, subereetis, 
squamiformibus, concavis, marginibus non reflexis, pallidis; spiculis 
5—15-nim spicatis, 1— 4 cm. longis, 2 mm. latis, 12 —50-floris, parum 
compressis, stramineis fuscescentibus; glumis ovatis, obtusis, vix carinatis; 
rhachillae alis oblongis, proventu solutis; staminibus 3; nuce cum 3), 
parte glumae aequilonga, oblonga aut ellipsoidea, trigona, nigra; stylo 
quam nux breviore, ramis 3 paullo exsertis. 
Oyperus articulatus Linn.! Sp. Pl. ed. I (1753) p. 44, ed. II 
p. 66; Kunth Enum. II p.53; Boeck. in Linnaea XXX VI (1869—70) 
p. 274, Griseb.! Pl. Oub. p. 237; Sawv.! Oub. n. 2582 p. 172. 
Sloane Jamaica I p. 121 t. 81 fig. 1. 
Hab. in ins. caribaeis: Sieber n. 107; in Cuba: C. Wright 
n. 3754; Jamaica: Elliott n. 3001, Purdie, W. Wright; Hispaniola: 
Mayerhoff; Portorico: Eggers n. 429, Sintenis n. 2503, 2548, 2549, 
5119, Stahl n. 1141; St. Thomas: Ehrenberg; Antigua: Wullschlaegel 
n. 682; Guadeloupe: Duchassaing; Martinique: Belanger n. 1257, 
Duss n. 700 partim, Hahn n. 1258; Trinidad: Crueger, Hart n. 2082, 
3298, 5025, O. Kuntze n. 1142. 
Distrib. in tropieis et calidis totius fere orbis terrarum. 
36. Cyperus nodosus Willd. culmo 3—8 dm. longo, apice 
1—1'/, mm. in diam., trigono; vagina summa in altero latere 1—5 cm. 
producta, rarius viridi; umbella 3—8 cm. in diam., 6—20-stachya; 
bracteis 5—10 mm. longis, ima erecta viridi marginibus in sieco recur- 
vatis scabris; ceteroquin fere ut C©. artieulati forma tenuior. * 
Cyperus nodosus Willd. Enum. Hort. Berol. (1809) p. 72; Boeck. 
in Linnaea XXXVI (1869—70) p. 275. 
Oyperus articulatus (partim) Kunth Enum. II (1837) p. 54; 
Griseb.! Flor. p. 564. 
Hab. in Jamaica: March; Martinique: Duss n. 700 partim. 
Distrib. in America centrali, Novo-Granata, Ecuador, 
_> 37. Cyperus rotundus Linn. glaber rhizomate tenuiore ligneo a 
tuberibus incrassato; culmis 1—8 dm. longis, basi bulboso-incrassatis, 
in rhizoma oblique descendentibus; foliis culmum saepe superantibus, 
4—6 mm. latis; umbella evoluta composita aut simplice vel depauperata; 
bracteis umbellam superantibus, cum foliis consimilibus; spieulis 3—8- 
nim laxiuscule spicatis, 2 em. longis, 11), —2 mm. latis, 20 — 30-floris, 
modice compressis, rubescentibus aut castaneis vel viridibus; rhachillae 
alis hyalinis, vix solubilibus; glumis ovatis, obtusis, in lateribus sub- 
