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 Vandew, 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 
united 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. Isay 
nothing of the tubercular processes upon the lip of all these 
genera, for 1 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 Karwinskii ; scapo paniculato, sepalis petalisque oblongo-lanceo- 
' latis apiculatis, labello obovato rigido ecristato venis centralibus incurvantibus 
lamellatis, margine columns serrato. Teoxomulco, prope Oaxaca, Kar $ 
winski. (Hb. reg. Monac. ) A noble species. Flowers 23 inches in 
diameter. Sepals and petals blotched with brown, upon a yellow ground. 
Odontoglossum angustatum ; scapo paniculato, sepalis lineari-lanceolatis acumi- 
natis, petalis ovato-lanceolatis unguiculatis undulatis, labello ovato-lanceolato 
acuminato : cristà baseos lamellatà multifidà, columnà muticà. Super 
arbores in valle Lloa, regni Quitensis, alt. 8000. ped. Hall. (Hb. Hooker.) 
Odontoglossum Hallii; seapo paniculato, sepalis petalisque ovato-lanceolatis 
acuminatis unguiculatis, labello oblongo acuminato pectinato; -cristá baseos 
lamellatä multifidà, columne alis bidentatis dente superiore aristato.——— 
Supra arbores in valle Llo® regni Quitensis, alt. 8000 ped. Hall. (Ho. 
Hooker.) A most beautiful species. Flowers blotched with brown 
upon a yellow ground, 33 inches in diameter, 
