It is extremely difficult to distinguish the species of 
this genus, which are probably more numerous than is even 
now supposed: we hope to be able, in time, to make this 
work a vehicle for conveying to the public accurate ideas 
respecting the greater part of them. 
Leaves glaucous, somewhat three-nerved, obtuse, those 
of the stem narrower, and more acute.  Bractee oblong, 
concave, shorter than the flowers. Sepals green, the outer 
lateral ones ovate-oblong, obtuse, as long as the labellum ; 
the uppermost oblong, arched, and shorter; the inner ones 
twice as short as the latter, obtuse, and smooth. Labellum 
oblong, dark-purple, hairy in front, smooth behind; the 
lateral lobes obtuse deflexed, the middle one longer and 
emarginate; the spot of the disc transverse, light-blue, 
wavy, and polished. 
Ae | J. L. 
