and petals pale-green, with three lines on strie, uniform, linear, 
patent, soon quite reflexed. Jip large, obovate, retuse, white, 
with three clevated lamellz or ridges, green at the base, but to- 
wards the apex muricated as it were with soft yellow papille : 
the base of the lip is extended into a short didymous spur. 
Column \arge in proportion to the size of the flower, semiterete, 
yellowish white, the margin expanded into a wing. Anther-case 
subtriquetrous (or rather saddle-shaped). Pollen-masses eight, oc- 
cupying the two cells of the anther-case. 
Fig. 1. Flower. 2. Column and anther, front view. 3. Side view of the 
pollen-masses. 4. Front view of ditto. 5. Side view of labellum and apex. 
6. Front view of ditto:—all more or less magnified. 
