66 
ONCIDIUM bicolor. 
Two-coloured Oncidium. 
GYNAN.DRIA MONANDRIA. 
Nat. ord. Orchidacea. § Vandea. 
ONCIDIUM. Supra, vol. 14. fol. 1073. 
§ Euoncidium, Heteranthium ; planifolia, tetrapetala , micropetala. 
0. bicolor ; pseudobulbis ovalibus compressimis utrinque 3-costatis, folio 
solitario oblongo sessili striato, panicula divaricata, sepalis lateralibus 
basi connatis petalisque ovatis acutis, labello maximo bilobo, disci tuber- 
culo hastato 3-partito, columnse alis rotundatis dentatis. 
This charming species of Oncidium, one of the rarest of 
its genus, was obtained by Messrs. Loddiges from the Spanish 
Main, and is 1243 of their catalogue. It flowered with 
them in September, 1842, when the accompanying figure was 
made. 
Among other peculiarities of the species may be mentioned 
its very thin pseudo-bulbs, and three-lobed crest of the label- 
lum, the front lobe of which projects forward, while the 
laterals are at right angles to it, and slightly toothed. It has 
moreover a very large lip, which, although deep clear yellow 
on the upper side, is almost white underneath, as also happens 
in some of the Chive-leaved species. 
Its nearest affinity is with O. bifolium. 
