MELASTOMACEA. 419 
4, Pleroma mexicanum, Triana in Trans. Linn. Soc. xxviii. p. 46. 
Melastoma mexicana, G. Don.. 
Rhezia tortuosa, Bonpl. Rhex. t. 7. 
Soutn Mexico, Zimapan (Coulter, 127), without precise locality (Bates), Huitamalco 
(Liebmann, 129). Hb. Kew. 
5. Pleroma naudinianum, Triana in Trans. Linn. Soc. xxviii. p. 46. 
Souta Mexico, Cordillera of Oaxaca (Galeotti, 3935); Costa Rica, in primeval woods 
of Carpintera, near Tres Rios (Polakowsky). Hb. Kew. 
6. Pleroma schiedeanum, Triana in Trans. Linn. Soc. xxviii. p. 45. 
Rhexia schiedeana, var. micrantha, Ch. et Schl. in Linnea, v. p. 565. 
South Mexico, Colipa (Liebmann), shady woods on the Cordillera of Oaxaca, near 
the Pacific Ocean, at 6500 to 8000 feet (Galeotti, 2931), without habitat (Schiede). 
Hb. Kew. 
7. Pleroma scabriusculum, Triana in Trans. Linn. Soc. xxviii. p. 46. 
Chetogastra scabriuscula, Schl. 
Oreocosmus ghiesbreghtii et O. galeottianus, Naud. in part. 
Sourn Mexico, mountains east of Oaxaca (Galeotti, 2935), Oaxaca (Ghiesbreght). 
Hb. Kew. 
9. ACIOTIS. 
Aciotis, Don in Mem. Wern. Soc. iv. p. 300; Benth. et Hook. Gen. Plant. i. p. 744; Triana in 
Trans. Linn. Soc. xxviii. p. 51. 
Twenty herbaceous species, ranging from Mexico through the West Indies and Central 
America to Peru and South Brazil. 
1. Aciotis purpurascens, Triana in Trans. Linn. Soc. xxviii. p. 52. 
Miconia purpurascens, DC. 
Spennera alata, Beurl. 
Panama, Chagres (Fendler, 149), Portobello (Billberg).—Common in the northern 
parts of Sourn America. Hb. Kew. 
2. Aciotis rostellata, Triana in Trans. Linn. Soc. xxviii. p. 51. 
Spennera rostellata, Naud. 
South MExico, in marshes, Teapa (Linden, 637). Hb. Kew. 
8. Aciotis rubricaulis, Triana in Trans. Linn. Soc. xxviii. p. 52. 
Spennera rubricaulis, Mart. 
Nicara@ua, Chontales (Tate, 228).—Gutana, Brazit. Hb. Kew. 
Tribe RHEXIEA. 
There are only three genera of this tribe, which is restricted to America. 
3h 2 
