Cynorkis tenuicalcar subsp. onivensis H.Perrier ex Hermans, Orchids Madagascar, ed. 2: 293 (2007).
Heterotypic Synonyms:

Cynorkis tenuicalcar subsp. onivensis H.Perrier, Arch. Bot. Bull. Mens. 5: 69 (1931), not effectively published.
Description:

Plants with the aspect and leaves of the type, but epiphytic, tubers very elongated and the flowers of a pretty clear red. Other difference include the scape, the bracts, the pedicel and the external parts of the flower sprinkled with pedicellate glands; the lateral sepals 5-6 veined, the labellum oval-lanceolate or oblanceolate, much wider medially or above and more or less elongated (but always attenuate toward the base), without the conical callus on the bane of the labellum; the viscidiums shortly spindle shaped, acute at both ends; median lobe of the rostellum shorter than the anther, half at long as the arms, stigmas as in the subsp. andasilbeensis, but longer than the arms of the rostellum.
Habitat:
Distribution:

C. Madagascar