CYPERACEZ. 457 
Beeckeler is our authority for this occurring in Mexico. There is probably the same 
plant in the Kew Herbarium from Nicaragua (Tate, 517) and Panama (Seemann, 130). 
17. Heleocharis stolonifera, Boeck. in Linnea, xxxvi. p. 424. 
Chetocyperus stoloniferus, Nees in Linnea, xix. p. 695 ; Steud. Cyper. p. 74. 
MeExico (Aschenborn). 
18. Heleocharis sulcata, Nees in Linnea, ix. p. 294; Boeck. in Linnea, xxxvi. 
p. 446. 
Scirpidium sulcatum, Nees, Cyper. Bras. p. 98. 
South Mexico, Chapultepec (Schaffner), Vera Cruz to Orizaba (Miiller, 2149); 
GuatemaLa, between Coban and Gualan (Bernoulli, 801); Panama (Seemann, 141).— 
CoLomBIA to GuiIANA and southward to Buenos Ayres. Hb. Kew. 
19. Heleocharis triflorus, Bceck. in Flora, 1880, p. 437. 
Mexico (Liebmann). 
4. DICHROMENA. 
Dichromena, Michx. Fl. Bor.-Am. i. p. 87; Benth. et Hook. Gen. Plant. iii. p. 1047. 
A genus of about eight species restricted to North and Tropical South America and 
Western Tropical Africa, where one of the American species recurs. There is also a 
plant in the Kew Herbarium, from Madagascar, which may belong to this genus. 
1. Dichromena leucocephala, Michx. Fl. Bor.-Am. i. p. 37; Kunth, Enum. 
Pl. ii. p. 275; Bot. U. S. & Mex. Bound. Surv. p. 229; Chapman, Fl. Southern U. S. 
p- 530; S. Wats. in Proc. Am. Acad. xviil. p. 171. 
Rhynchospora leucocephala, Boeck. in Linnea, xxxvil. p. 582. 
Rhynchospora stellata, Griseb. Fl. Brit. W. Ind. p. 577. 
The Bermupas; New Jersey to FLoripa and Texas.—Sovutu Mexico, Lagos (Hartweg), 
Rio Blanco, Orizaba (Bourgeau, 2629), Vera Cruz (Miller, 2151).—Southward to Braz 
and in the West Inpies. Hb. Kew. 
2. Dichromena nervosa, Vahl, Enum. Pl. ii. p. 241. 
Rhynchospora nervosa, Boeck. in Linnea, xxxvii. p. 529. 
Dichromena ciliata, Vahl, Enum. Pl. ii. p. 240; Kunth, Enum, Pl. ii. p. 276; Liebm. Mexicos 
Halvegr. p. 59. 
Rhynchospora vahliana, Griseb. Fl. Brit. W. Ind. p. 577. 
Dichromena globosa, Roem. et Schult. Syst. Veg. ii. p. 90; Kunth, Enum. Pl. ii. p. 276. 
Dichromena pura, Nees, Cyper. Bras. p. 112, in nota; Steud. Cyper. p. 135. 
Rhynchospora pura, Griseb. Fl. Brit. W. Ind. p. 577. 
SoutH Mexico, Huitamalco, Puebla, and Talea, Oaxaca (Liebmann), without locality 
(Harris); Costa Rica (ex Backeler); Panama, Chagres (Kendler, 342; Hinds).— 
CoLomBia to CHILI, GuiANAa and BraziL, ana in the Wrst Inpizgs. Hb. Kew. 
BIOL. CENTR.-AMEB., Bot. Vol. Il, February 1885. 3% 
