This name is a synonym of Dorstenia benguellensis Welw..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 100376652) with original publication details: Bull. Jard. Bot. État Brux. 19: 59–63 1948.
This name record (from Tropicos) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Dorstenia benguellensis in version 1 of The Plant List.