lobe red-purple, with often a white disk, very broadly tri- 

 angular, acute, angles auricled ; disk with a semilunar callus, 

 the outer margin of which is broken up into a fimbriate 

 crest ; at the base of the disk is a linear appendage project- 

 ing forwards, divided to near the base into four slender 

 filaments, almost as long as the terminal lobe. — J. D. H. 



Fig. 1, Column and lip ; 2, part view of ditto ; 3, pollinia : — all magnified. 



