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 and as an invalid name (record 318183) with original publication details: Hortus Maurit. 219 1837.
This name was in version 1 of The Plant List, record kew-318183.