This name is a synonym of Begonia sinofloribunda Dorr.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 371117) with original publication details: Acta Phytotax. Sin. 35: 48 1997.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:994623-1.
This name was in version 1 of The Plant List, record kew-371117, and has not been changed.