Descr. Pseudcbutb obpyriform, smooth. /. ives four to 

 six inches long, elliptic-lanceolate, acuminate, thin, subpli- 

 cately nerved ; nerves strong beneath, narrowed at the 

 base ; petiole one and a half to two inches long, stout, 

 terete, green. Raceme one to two feet long, springing from 

 the base of the pseudobulb and there sheathed by short im- 

 bricate spathes, laxly many-flowered ; bracts half an inch 

 long, hard, smooth, cymbiform, red-brown, embracing the pe- 

 dicels. Floivers two inches in diameter, pale, rather dingy 

 ochreous or citrinous yellow. Sepals linear-oblong, obtuse. 

 Petals as long but narrower, oblanceolate or elliptic-lanceo- 

 late, acute. Lip nearly as long as the sepals, not at all 

 saccate ; lateral lobes elon^ate-oblongr obtuse, incurved, 

 externally leaden-grey with purple tips, internally beauti- 

 fully longitudinally striped with maroon-brown and yellow; 

 disk between the lateral lobes with six rows of keels or 

 crests, of which the outer and mesial bear tubercles with 

 flattened crowns ; midlobe small, suborbicular, notched at 

 the tip with a mesial tooth, disk covered with a broad two- 

 lobed tumid rugged or toothed yellow and brown crest or 

 boss confluent with the ridges between the side-lobes, and 

 leaving a narrow yellow membranous border to the lobe. 

 Column rather slender, narrowly winged, top round and 

 crenulate. — /. 1). II. 



Fig. 1, Lip; 2, column ; 3, anther; 4, pollinia : — all enlanjed. 



