ONCIDIUM CONCOLOR. 
[Puate 1.] 
Natiwe of the Organ Mountains of Brazil. 
Epiphytal. Pseudobulbs small, tufted, ovate or ovate-oblong, compressed, somewhat 
furrowed, two-leaved. Leaves subcoriaceous, oblong-linear or ligulate, acute, bright green. 
Scape radical, springing from the base of the young pseudobulbs, drooping, furnished 
with small bracts. Flowers yellow, racemose ; sepals dorsal) ovate-lanceolate or obovate, 
acute, the lateral ones smaller, lance-shaped, and united behind the lip for about half 
their length ; petals obovate, acute, somewhat undulated, about as long as the sepals; 
lip (labellum) large and prominent, roundish subpanduriform, -emar inate, somewhat 
clawed, furnished with a pair of plates or lamelle (bilamellate) at the base, of a clear 
yellow colour, as are the sepals and petals. Column about half as long as the petals, 
with a projecting tooth on each side. 
Oncipium concotor, Hooker, Botanical Magazine, t. 3752; Lindley, Folia Orchidacea, 
Art, Oncidium, No. 65 (excl. syn. Klotzsch) ; Reichenbach fil. in Walpers’ Annales 
Botanices Systematica, vi. 731.; Carriere, in Revue Horticole, 1881, 30, with tab. 
Cyrrocuitum crrrinum, Hooker, Botanical Magazine, t. 4454. 
¢ 
The brilliant little plant here figured—a representation in the tribe Vandee, of 
the great genus Oncidiwm—belongs to the group of Oncids which Lindley named 
Tetrapetala micropetala, in which two of the sepals are united so that the petaloid 
organs, as distinguished from the lip, are reduced to four in number (tetrapetala), 
and” at the same time the petals, which are about equal in size to the sepals, are 
comparatively small by comparison with the remaining organ. 
This species, although not new, was until recently extremely rare, and was, indeed, 
seldom met with in collections ; now, however, the little gem is very plentiful, 
thanks to the indefatigable zeal of our collectors, so that growers who do not possess 
it may obtain it at a very small cost. The species is one of the most compact- 
growing and beautiful of the Oncidiums, producing, as it does, from the base of the 
new bulbs, many-flowered drooping spikes of rich yellow blossoms. It is an excellent 
subject for planting in a pan or basket to be suspended from the roof of the 
house, where the brightly-coloured flowers , produce a charming effect; indeed, we do 
not know of any Orchid which has a_ better appearance when grown in this way. 
Oncidium concolor succeeds best in a compost of peat with a little sphagnum 
moss added, and with plenty of good drainage. We have grown it most successfully 
in small pans, but it can be cultivated either in a basket or on a block. It would 
ee : 
