becoming tetragonous, very strongly compressed, and 
bearing from. the uppermost nodes two or three leaves; 
upper internodes clothed with white, ovate- faceolube 
acuminate sheaths ; flowering pseudobulbs longer than the 
leafing, very slender and terete below, dilating upwards 
into a strongly compressed, sub-clavate, tetragonous, sub- 
faleate, green rhachis three to four inches long by about 
one-third of an inch broad; internodes about as long as 
broad, margins acute. Leaves about threeinches long, ovate- 
lanceolate, acuminate. Flowers secund on one face of the 
rhachis, solitary, arising alternately from oblong depres- 
sions towards the margins of the internodes ; pedicels very 
short, clothed with minute, rounded, imbricating bracts. 
Sepals and petals sub-similar, spreading and recurved, 
oblung-lanceolate, acuminate, white. zp shorter than the 
sepals, lateral Jobes convolute, forming a cylindric tube, 
pale yellow, streaked with purple within; mouth of tube 
obliquely truncate, with a short triangular tip repre- 
senting the terminal lobe; disk with two, stout, erect, 
basal spines.—J. D. H. 
Fig. 1, lip; 2, lip with one side-lobe removed; 3, column; 4, anther ; 
5, poliinia —All enlarged. 
