a large convex, somewhat, horse-shoe shaped, fleshy éwber- 
cle; and the base itself, articulated upon the base of the 
column, runs down into an obtuse whitish spur. Column 
semiterete, about half as long as the petals, yellow-green, 
marked with lines and spots of purple. Stigma convex. 
Anther terminal, ovate, yellowish-white, remarkably com- 
pressed, almost exactly slipper-shaped, and fixed by a 
minute point, near the centre of the disc below, within two 
celled, cells sub-two-valved. Pollen masses, two, large, 
ellow, with each of them a small lobe or pollen mass 
hind ; so that they might be said to be four; and these 
fixed to a large reddish giand. Germen linear, clavate, 
green, not twisted. = 
This was received in February, 1827, along with the 
Fragrant PLEUROTHALLIs, given in the preceding number, 
from Mr. Mackay, of the Dublin College Botanic Garden, 
and was by him imported from Brazil. It is a plant of 
great beauty, and may be numbered amongst the most 
shewy of the highly interesting family of Orchideous plants. 
It is so unlike in the structure of its flower to any describ- 
ed plant, that I have no hesitation, in constituting of it a 
new genus. Besides the union of the five petals at the 
base (whence I have derived the generic appellation), the 
Anther will be found to be of a curious structure. Even 
when viewed from the under side, the pollen masses are 
concealed partly by the peculiar form of the Anther-case 
itself, and partly by the smgular nature of the cells. 
The noble specimen here figured was cultivated in the 
stove, in peat earth. — 
Fig. 1. Back view of an Anther removed from the top of the column at 
f.2. 3. Under side of the Anther, including the Pollen Masses, 4. Ditto from 
which the Pollen Masses are removed. 5, Back view of the Pollen Masses. 
6. Under side of ditto —All magnified. 
