48 
* ODONTOGLOSSUM Rossii 
Ross's Odontoglossum. : 
GYNANDRIA MONANDRIA. 
Nat. ord. ORCHIDACE®, $ VANDE&. 
ODONTOGLOSSUM, Kunth. Sepala lateralia patula libera, Labellum 
planum, unguiculatum, ascendens, limbo. reflexo diviso dentato apice angustato ; 
basi concavum cristá bilamellatá rard fimbriatá sepiús anticé bidentatá auctum. 
Columna elongata, apice auriculata aut aptera. Sertum Orchidaceum, t. 25. 
Odontoglossum Rossii; pseudobulbis ovatis ceespitosis ancipitibus monophyllis, 
foliis oblongo-lanceolatis scapo radicali subbifloro longioribus, bracteis mem- 
branaceis carinatis acuminatis, sepalis lineari-lanceolatis carinatis acuminatis 
patentibus, petalis oblongis obtusis revolutis, labello subrotundo-ovato emar- 
ginato undulato lamellis unguis confluentibus rotundatis denticulis 2 ante- 
rioribus obtusis, columná apterá pubescente. Sertum Orchid. t. 25. 
Pseudobulbi compressi, vaginis marcescentibus breviores. Folia erecta, 
bipollicaria, lanceolata, striata, vix coriacea, scapo longiora. Scapus erectus, 
radicalis, medio nudus aut squamá solitariá auctus, subbiflorus ; pedunculis 
medio vaginatis. Flores 2 uncias lati, erecti ; sepalis patentissimis, lanceo- 
latis, luteo-viridibus fusco maculatis ; petalis albis basi purpureo guttatis ; 
labello candido, purissimo, sub lente minutissime pubescente, ungue 3 lineas 
longo columná apterá velutiná paulo breviore. Lamelle labelli carnose, an- 
tice connate, fronte bidentate, lutea, intus sanguineo striate. Stigma pur- 
pureo-marginatum. 
A charming plant, sent to Mr. Barker from Mexico by 
his collector Mr. Ross, after whom it is named. The bright 
white lip, lying as it were in the centre of a rich green 
yellow and blue star of three points, produces a peculiarly 
beautiful and unusual appearance. 
Many of the species of this genus are however handsomer, 
and few less beautiful than this; let us therefore hope 
that Mr. Hartweg will sueceed in procuring them for the 
* From odove a tooth, and yhwoca a tongue, in allusion to the toothings of 
the labellum at the base. : 
