This name is a synonym of Markhamia zanzibarica (Bojer ex DC.) K.Schum..
The record derives from iPlants
(data supplied on 2012-03-23)
which reports it as a synonym (record 319279) with original publication details: J. Bot. 3: 329 1865.
This name was in version 1 of The Plant List, record kew-319279.