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ONCIDIUM C1TRINUM. 
(LEMON-COLOURED ONCIDIUM. ) 
CLASS. ORDER 
GYNANDRIA. , MONANDRIA, 
NATURAL ORDER. 
ORCHIDEiE. 
Generic Character. — Lip expanded, lubed, tubercled at the base. Petals spreading, sometimes only 
four. Column winged. Pollen masses two, two lobed behind, fixed by the middle to the com- 
mon process of the stigma. — Loudon's Ency. of Plants. 
Specific Character. — Plant a stove Epiphyte, with oblong compressed pseudo-bulbs, surmounted by 
two sword-shaped rather stiff leaves. Scape simple. Sepals and Petals linear-oblong undulated. 
Labellum dilated, appearing as if half bifid. Stigma round. 
This, although not so handsome as other, but less rare, species of the genus 
Oncidium, is, nevertheless, highly worthy of a place in the most select collections, 
on account of its bold appearance and pretty lemon-coloured flowers. Messrs. 
Loddiges, to whom we are indebted for its introduction, received it from Trinidad 
in 1835. 
Like the rest of the species, it requires a hot humid atmosphere : it is rather a 
shy grower, therefore must be treated with great care : one thing particular must 
be strictly adhered to ; that is, never to over water it at the roots. 
Dr. Lindley has pointed out the following characteristics as necessary to dis- 
tinguish this species from O. altissimum. " Its flowering stem is simple and not 
branched ; its flowers are of a pale lemon colour, very distant from each other, and 
by no means so much spotted j the crest of the lip consists of about eight warts, 
which are slightly downy, and not of nine smooth finger-like processes ; its stigma 
is nearly orbicular, and not long and narrow, and the wings of the column are 
exceedingly small ; and, finally, both the pseudo-bulb and the leaves have a singu- 
larly yellow tint." 
The generic name is given in reference to the tumours or prominences which 
appear on the disc of the labellum. 
