727 
ONCIDIUM luridum. 
Mr. Griffin's Oncidium. 
GYNANDRIA_ MONANDRIA. 
Nat. ord. ORCHIDEX. Brown prod.1. 309. Div. {V. Anthera ter- 
minalis mobilis decidua. Masse pollinis demim cereacer. Brown in Hort. 
Kew. ed. 2.5.205. : : 
ONCIDIUM. Labellum explanatum lobatum basi tuberculatum. Pe- 
tala patentia (2 antica nunc connata). Columna alata. Masse pollinis 2, ° 
posticé bilobz, medio affixe process communi stigmatis. Brown in loc. 
cit, 215. a 
O. luridum, foliis ellipticis acutis, scapo stricto ramoso, perianthii laciniis 
patentibus undulatis retusis subequalibus, labello reniformi, columne 
alis rotundatis. J. L. 
x a a 
An unrecorded species; drawn from the collection of 
Mr. Griffin, at South Lambeth. Native of South America. 
It is very nearly related to Oncidium carthaginense, from 
which it is nevertheless essentially distinguished by the 
different shape of its flowers, and by having its upper petal — 
shaped like those next it, and not galeate and incumbent 
upon the column as in O. carthaginense. It also seems to 
differ from the latter species in not having the two lateral 
outer petals smaller than the corresponding inner petals, 
and in having a colourless, not red, columna. The Onci- — 
dium olivaceum of M. Kunth, which probably resembles this — 
in some particulars, is obviously distinguished by its re- 
flexed petals and trifid labellum. J. L. . 
Oncipium is distinguished in its division of the order 
by “ a flat-lobed label, knobby at the base; spreading pe- 
tals (the two front ones of which are sometimes grown to- 
gether) ; a winged column; a pair of pollen-masses, double- 
lobed behind, and fixed at the middle by a common pro- 
cess belonging to the stigma.” 
The coloured leaf and uncoloured scape, in our figure, 
are much diminished: the coloured spike of flowers and 
uncoloured leaf are of the natural size. 7 
.y 
‘ 
