This name is a synonym of Begonia quadrialata Warb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 362378) with original publication details: Bull. Misc. Inform. Kew 1908: 259 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:105219-1.
This name was in version 1 of The Plant List, record kew-362378.