Not an accepted name (status: unknown). The accepted name is Benthamia erinacea f. erinacea.

Benthamia nigrescens subsp. decaryana H.Perrier, 1934 2% complete

No common name

Bull. Soc. Bot. France 81: 30 (1934)

There is no corrections for Benthamia nigrescens subsp. decaryana yet.