MR DAVID DON 
duabus membranaceis in aestlvatione munitus: Umbo 5 
quandoque 6-partito, patente, rotato, fere simul cum petalis 
caduco. Petala 5 raro 6, obovata v. obcordala, apice 
quandoque oblique mucronulata, ad summam tubi calycini 
insidentia. Stainina 10 raro IS, declinato-assurgentia, sub- 
sequalia: Jilamenta teretia (interdum compressiuscula), 
glanduiis paucis capitatis aspersa aut rarius pilosa v. bar- 
bata: «w^7iercp longissimae, subulatje, basi supra papilloso- 
glandulosae, biauriculatse, in stipite brevissimo arcuato pro- 
ductae, antice transverse rugosse, superne rostratag poro 
unico obliquo dehiscentes. Ovarium ovatum tubo calycis 
inclusum, truncatum. Stylus teres, elongatus, declinatus, 
superne curvatus. Stigma punctum pruinosum. Capsula 
baccata, tubo calycino obtecta, 5 rarius 6-locularis, medio 
cuj usque loculi a rima oblonga quinquefariam dehiscens. 
Dissepimenta membranacea, medio val varum inserta, axi 
centrali levius connexa. Placentas 5 interdum 6, oblongae, 
trigonse, carnosae, in singulis loculis singulas et iisdem con- 
formes, scrobiculatas, imbricate seminiferse. Seminarnxmevo- 
sa, reniformi-globosa, punctata, pallide fusca : testa simplex, 
crassiuscula, Crustacea, fragilis : albumen nullum. Embryo 
arcuatus, semini conformis, albus : cotyl. insequales, breves, 
crassae, subovales : radicula teres, vaga, cotyledonibus Ion- 
gior. 
Frutices {Brazilienses v. Peruviani) spectabiles, sericeo- 
canescentes aut hispide setosi. Folia integerrima, 3 v. 5- 
nerviay petiolata aut rarius (in holosericea) subsessilia, 
Flores terminales, paniculati, speciosi, purpurei aut vio^ 
lacei. 
Obs. Genus ab Melastoma cui proximum discrepans : 
limbo calycis fere simul cum petalis caduco, antheris sub- 
sequalibus basi arcuatis absque processu bicalcarato^ testa 
seminis simplici. 
