This name is a synonym of Cynorkis lilacina subsp. curvicalcar (H.Perrier) H.Perrier.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 53519) with original publication details: Arch. Bot. Bull. Mens. 5: 53 1931.
This name was in version 1 of The Plant List, record kew-53519, and has not been changed.