120 C. NAUDIN. — MELASTOM ACE ARUM 



5-costatuin apice truncato umbilicatum 5-loculare. Stylus cras- 

 siusculus, stigmate obtuso punctiformi. Capsula calyce persistente 

 circumdata loculicide 5-valvis, placentis productis margine incras 

 satis. Semina oblongo-pyramidata, hilo basilari. 



Frutices austro-americani monticolœ , glabri aut in novellis 

 parce furfuracei; foliis subcoriaceis petiolatis elliptico-ovatis obo- 

 vatisque acutis denticulatis 5-5-nerviis, nervulis transversis sub- 

 approximatis parallelis; paniculis brevibus subcorymbiformibas , 

 ramulîs ut plurimum 3-floris; floribus peclicellatis. 



Genus Merianias proximum, ab ea vix satis diversum limbo 

 calycino integro dentibusque externis obsoletis. 



1. Chastema Merianle DC, /. c. — Decaisne, Deless, Icon, 

 sélect, plant., Y, tab. 2. 



C. glaberrima ; foliis late ellipticis apice acutis basi subacuminatis 

 serratis tripli-quintuplinerviis ; paniculis suboliganthis; caly- 

 cibus depressis ; antherarum vesicula postica rotundata obtusa 

 tcrminali. 



Folia 4-6 centim. longa, 2-3 lata, a<ljecto utroque nervo marginali 

 quintuplinervia aut prœtermissotriplinervia , petiolissesquicentimetrum 

 et quod exceditlongis. Paniculse aphyllae brèves nonnihil coryuibiformes, 

 ramulis 3-floris, pedieellis florum propriis circiter centimetralibus. Ga 

 lyces latissime campanulati idcircoque quasi depressi, limbo vix perspi- 

 cue 5-sinuato, extus tuberculis totidem denticulorum externorum rudi- 

 ments instructo. Petala late retusa subinaequilatera concava , circiter 

 sesquicentimetrum longa , sub anthesi exsertissima , alba aut rosea. — 

 In monte Saraguru Reipublica3 novo-granatensis ; Bonpland. 



2. CHASTEMA affinis f. 



C. prsecedenti fere simillima, glabra; foliis longiuscule petiolatis 

 late ovatis subacutis remote sinuato-dentatis , adjecto nervo 

 utroque submarginali 5-nerviis; calycibus depressis; anthera- 

 rum vesicula ovoidea postice apiculata. 



Species primo obtutu C. Merianiœ similis , ab ea tamen characteribus 

 paucissed facile deprehendendisdistinguenda. Folia quam in illa latiora, 



