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 317562) with original publication details: J. Bot. 3: 329 1865.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:110126-1.
This name was in version 1 of The Plant List, record kew-317562.