12 
ONCIDlUM bicallosum. 
Two-warted Oncidium. 
GYNANDRIA MONANBRIA. 
Nat. ord. OrchidacejE § Vande^e. 
ONCIDIUM. Swartz. 
Euoncidium ; Heteranthium ; Folia plana; Pentapetala; Micropetala ; 
labello pandurato ; i. e. medio constricto basi angustiore. Sertum Or- 
chidaceum sub t. 48. 
0. bicallosum ; bracteis ovatis membranaceis obtusis, sepalis liberis obovatis 
concavis, petalis oblongis obtusis, labelli lobis lateralibus abbreviatis in- 
termedio maximo transverso emarginato subcordato, crista bicallosa, 
tuberculis distantibus uno ante alterum posito rugosis subtrilobis, co- 
lumngc auriculis linearibus falcatim recurvis. Lindl. in Bentham pi. 
Hartw.p. 94. 
Among the numerous fine things found in Guatemala by 
Mr. Skinner, there are not many which are more deserving of 
cultivation than this plant, which has so much the habit of 
O. Cavendishianum as to seem a mere variety of it, although 
in reality quite a distinct species. It was also met with by 
Mr. Hartweg. The flowers are fully two inches in diameter, 
which is four times the size of O. Cavendishianum ; they 
appear in a dwarf erect raceme, not panicle; they are of a rich 
yellow, with the sepals and petals bordered with cinnamon 
colour ; the labellum has two very small lateral lobes, and for 
its crest it has a pair of distinct tubercles, the posterior 
double, the anterior 3-lobed, and the two separated by a con- 
siderable space. The flowers are moreover slightly scented, 
which is not the case with O. Cavendishianum. Many plants 
are doubtless in the country ; but no one has succeeded in 
flowering them except Mr. Bateman, who sent a fine specimen 
to a late meeting of the Horticultural Society, 
The figure at the corner of the plate shews the peculiar 
arrangement of the warts on the crest of the lip. Besides 
March, 1843. 
F 
