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 320760) with original publication details: Bull. Misc. Inform. Kew 1894: 31 1894.
This name was in version 1 of The Plant List, record kew-320760.