This name is a synonym of Strophanthus welwitschii (Baill.) K.Schum..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 198184) with original publication details: Forest Fl. N. Rhodes. 351 1962.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:81854-1.
This name was in version 1 of The Plant List, record kew-198184, and has not been changed.