exceeding the flowers ; lateral sepals projecting forward, obliquely 

 oblong acute apiculate, below the apex, 1'4 cm. long; odd sepal 

 horizontal, somewhat helmet-shaped, mouth orbicular, equalling 

 the lateral sepals in length, produced behind into a spreading 

 filiform spur 1*3 cm. long, which is deflexed at the apex ; petals 

 erect lanceolate-falcate, incurved at the apex, at the base lobed 

 in front, the lobe oblong and rounded ; lip spreading-decurved 

 oblong or oblong-lanceolate obtuse, 1 cm. long, rostellum short 

 erect bifid ; anther resupinate. 



The chief marks of distinction from D. cornuta are the longer 

 slenderer straighter spur and the much narrower and differently 

 marked lip. It is also a taller plant with longer leaves. 



