In the san ? rich collection we find two other genera 

 nearly allied to Cirrhaea, of which the following will be the 

 names and characters : — 



Myanthus. 



Perianthium explanatum. Sepala libera, sequalia, lateralibus paululum 

 ascendentibus. Petala conformia, angustiora, sepalo supremo supposita. 

 Labellum planum, obovatum, 3-dentatum, sepalis brevius. Columna erecta, 

 teres, basi bicirrhosa, postice ad cardinem antherse longe producta. Anthera 

 et pollinia Cataseti. Epiphyta, Cataseti omnin6 vegetatione. 



1. Myanthus cernuus. Found on trees in the neigh- 

 bourhood of Rio Janeiro. The racemes are cernuous, and 

 about a foot long, or more. The flowers have a greenish 

 yellow ground, closely covered with rich reddish brown 



spots. Perhaps Catasetum cristatum would be better 



referred to this genus. 



MoNACHANTHUS. 



Perianthium explanatum. Sepala et petala sequalia, deorsum versa. 

 Labellum posticum, carnosum, indivisum, ventrieosum, sepalis multo majus. 



Columna brevis, crassa, mutica. Anthera Pollinia Epiphyta, 



Cataseti habitu. 



1. Monachanthus viridis. Found on trees in the Cor- 

 covado. 



The fleshy stems are exactly those of Catasetum, as 

 are the leaves, except that they are shorter. In the draw- 

 ing we have examined, the flowers are represented in pairs 

 from the apex of an erect scape about 9 inches high : they 

 are fleshy, and of a deep uniform green, with a labellum 

 that looks something like a hood drawn over a little face 

 represented by the column. 



This genus differs from Catasetum in the want of cirrhi 

 upon its short column, and in the expanded perianthium, 

 the five segments of which are turned all one way, like those 

 of Eulophia. 



v J. L. 



