This name is a synonym of Begonia porteri H.Lév. & Vaniot.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 361065) with original publication details: Fl. Kouy-Tchéou 45 1914.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:104264-1.
This name was in version 1 of The Plant List, record kew-361065, and has not been changed.