66 



ONCIDIUM bicolor. 

 Tivo-coloured Oncidlum. 



GYNANDRIA MONANDRIA. 



Nat. ord. Orchidace^. § Vande^. 

 ONCIDIUM. Supra, vol. 14. fol. 1073. 



§ EuoNCiDiuM, Heteranthium ; planifoUa, tetrapetala, micropetala. 



0. bicolor ; pseudobulbis ovalibus compressirais utrinque 3-costatis, folio 

 solitario oblongo sessili striato, panicula divaricata, sepalis lateralibus 

 basi connatis petalisque ovatis aciitis, labello maximo bilobo, disci tuber- 

 culo hastate 3-partito, columnse alls 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. 



