certain Plants formerly referred to the Genus Cinchona. 141 



In several species of the normal group of this genus the inner surface of the 

 corolla is lined with a thick coat of hairs, analogous to the pili coUectores 

 which cover the branches of the style and the upper surface of the lobes of the 

 corolla in many Compositse. 



C O S M I B U E N A. Ruiz et Pavon. 



BuENA. Persoon et DeCand. 



Cinchona sp. Auctt. 



Calyx 5-dentatus. Corolla tubulosa, limbo 5-loba, eestivatione imbricata. 

 Antherce oblongse, exsertse. Stigma bipartitum. Capsula subquadrilo- 

 cularis, ab apice dehiscens, polysperma. Dissepimenta e duplici valvarum 

 margine revoluto seminifero constituta. Semina peltata, angusta, ramen- 

 tacea, extremitatibus fibrosis. 



Arbores (Amer. Merid.) in/lor escent id cymosd. 



1 . C. obtusifolia. Ruiz et Pavon. 2. acuminata. Ritiz et Pavon. 



In Buena hexandra of Pohl, which M. De Candolle has retained in this 

 genus, the aestivation of corolla is valvate, and the structure of the capsule 

 apparently the same as in Cinchona, to which I am disposed to refer it. 

 Whether, as Pohl has suggested, the Cinchona dichotoma of Ruiz and Pavon 

 ought to be referred to the present genus I am unable to decide, the specimens 

 being without flowers, as represented in the plate of the Flora Peruviana, 

 although the structure of the capsule is pretty nearly similar to that of Cosmi- 

 buena. 



Having had no opportunity of examining any species of M. De Candolle's 

 Remijia, I am uncertain whether it is entitled to be regarded as a distinct 

 genus ; but if it should prove different, other characters than those mentioned 

 by that celebrated botanist must be looked for to distinguish it from Cinchona, 

 as the peltate seeds are common to most of the genera now under considera- 

 tion, and the description of the dehiscence of the capsule appears to have 

 originated in a misconception of the account given by M. Auguste de St. Hi- 

 laire. 



