ONCIDIUM BARKERI. 
(Mr, Barker's Oncidium.) 
Class. Order. 
GYNANDRIA. MONANDRIA. 
Natural Order. 
ORCHID ACE J£. 
Generic Character.— Perianth showy. Sepals often 
undulated, lateral ones sometimes connate with the 
lower part of the labellum. Petals similar. Labellum 
largest, spurJess, continuous with the column, variously 
lobed, tubercled or crested at the base. Column free, 
semi-cylindrical, winged at the top on both sides. 
Anthers usually two-celled ; rostellum sometimes 
shortened, sometimes elongated and beaked. Pollen- 
masses two, furrowed behind ; caudicula plain ; gland 
oblong. 
Specific Character.— Pseudo-bulbs oval .compressed, 
blunt-edged, with a furrow or two passing down each 
side. Leaves small for the size of the plant, two to 
each pseudo-bulb, of an oblong-lanceolate form, with 
a long sheathing striated footstalk, which is distinctly 
articulated in the middle. Flowers disposed in a 
simple curved raceme, and consist of from five to 
seven in number. Sepals and petals alike in form and 
colour, linear-lanceolate, wavy, spreading, or turned 
back, the lateral very slightly adhering at the base ; 
they are covered with deep rich brown spots and 
bands on a pale cinnamon-coloured ground. Lip pure 
yellow, without spotting, much paler on the under 
side, and longer than the sepals ; middle lobe large, 
broader than long, slightly pointed at the top, which 
curves inwards in the manner usual in this genus ; it 
is distinctly stalked : lateral lobes flat, oblong, trun- 
cate, with rounded angles, one-third the breadth of 
the middle lobe. Crest consists of an anterior tubercle 
slightly three-lobed and hollowed out in front, and of 
a depressed, two-lobed elevation immediately behind 
it. Column unusually short, pale-yellow, with a pair 
of rounded oblong wings.— Lindley, in Sert. Orchid., 48. 
This fine species of Oncidium was imported from Mexico some years ago, by 
Mr. Barker, in whose collection it flowered in 1841, when it received its present 
name by Dr. Lindley, who published a notice of it in the Botanical Kegister of 
that year, No. 174 of the miscellaneous matter. It has, since that period, flowered 
in several other places, first with Mrs. Lawrence, at Ealing Park ; also in November 
last with J. W. Schroder, Esq., Stratford Green, Essex, where our drawing was 
made; and latterly, during February and March of the present year, at Chats- 
worth. 
Like the other species of Oncidium, this requires a hot and very damp situation, 
and also in its growing state a liberal supply of water ; but when it has perfected 
its summer's growth, it should be gradually dried off, and have a rest for about 
three months in a cool and dry temperature. It may either be placed in a basket 
VOL. XIV. NO. CLXI. O 
