Westcott had called the plant Macrochilus Fryanus, and as 

 the former name was published a month earlier the latter will 

 have to give way. 



The genera Brassia, Miltonia, Cyrtochilum, Odontoglos- 

 sium, and Oncidium are closely related, and no doubt form 

 the nucleus of a group of Vandese, the limits of which remain 

 to be ascertained. Of these, Oncidium has a column with 

 two ears, and a distinct lobed lip; Miltonia a column with two 

 ears, and an entire lip partially united to it at the base ; 

 Odontoglossum a winged column, and an entire lip partially 

 imited to it at the base ; Cyrtochilum a winged column and 

 a distinct entire lip ; and finally, Brassia has a column that 

 is neither winged nor eared, and a distinct entire lip. I say 

 nothing of the tubercular processes upon the lip of all these 

 genera, for I do not see how they will serve with any cer- 

 tainty to distinguish them. Moreover, Oncidium and Cyr- 

 tochilum should have unguiculate sepals and petals, while 

 all the other genera have them sessile. While, however, 

 such are the real distinctions between these genera, I am 

 by no means sure that all the species now stationed under 

 them are rightly placed. But that is a question upon which 

 I cannot enter at this time. 



Miltonia differs from Oncidium in its lip being slightly 

 connected with the column, much dilated and undivided ; 

 and from Odontoglossum, Brassia, and Cyrtochilum, in its 

 column being auricled, and its lip not only much larger than 

 the sepals, but also altogether different in form. 



The following are additional species of these genera. 



/ Cyrtochilum Karwinsku ; scapo paniculato, sepalis petalisque oblongo-lancco- 

 latis apiculatis, labcllo obovato rigido ecristato vcnis ccntralibus incurvantibus 



lamcllatis, margine columnae serrato. Teoxomulco, propc Oaxaca, Kar- 



winski. (Hh. re(j. Monac.) A noble species. Flowers Ih inches in 



diameter. Sepals and petals blotched with brown, upon a yellow ground. 

 OdoiitO(jlossum awjustatum ; scapo paniculato, sepalis lineari-lanceolatis acumi- 

 natis, petalis ovato-lanceolatis unguiculatis undidatis, labello ovato-lanceolato 



acuminato : crista baseos lamellata niultifida, columna mutica. Super 



arbores in valle Lloa, regni Quitensis, alt. 8000. ped. Hall. (//Zi. Hooker.) 



Odontoglossum Hallii ; scapo paniculato, sepalis petalisque ovato-lanceolatis 

 acuminatis unguiculatis, labello oblongo acuminato pectinato ; crista baseos 



lamellata multifida, colunnia^ alis bidentatis dcntc supcriore aristato. 



Supra arbores in valle L1o;ij regni Quitensis, alt. 8000 pcd. Hall. (Ho. 



Hooker.) A most beautiful species. Flowers blotched with brown 



upon a yellow ground, 3.J inches in diametci'. 



