Benthamia nigrescens subsp. decaryana H.Perrier, Bull. Soc. Bot. France 81: 30 (1934).
Description:
Differing from ssp. typica by the more unilateral inflorescence, the labellum being narrower, the anther shortly apiculate and the staminodes not more than 2/3 the length of the anther.
Habitat:
Distribution:
NW. Madagascar