Cynorkis lilacina subsp. curvicalcar (H.Perrier) H.Perrier, in Fl. Madag. 49(1): 92 (1939).
Homotypic Synonyms:

Cynorkis andringitrana subsp. curvicalcar H.Perrier, Arch. Bot. Bull. Mens. 5: 53 (1931).
Description:

Differing from all of the previous forms of C. lilacina, by the petals with their external margins more dilate-angular and 1 veined medially or slightly above, the spur short (5 mm) and very shortly recurved apically, but not dilate and with the rostellum much shorter (1 mm), much like the previous type, with 4 teeth in front and with a small median notch.
Habitat:
Distribution:

N. Madagascar