This name is a synonym of Begonia horticola Irmsch..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 362552) with original publication details: Bull. Misc. Inform. Kew 1912: 329 1912.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:105362-1.
This name was in version 1 of The Plant List, record kew-362552, and has not been changed.