This name is a synonym of Begonia sartorii Liebm..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 361281) with original publication details: Bull. Herb. Boissier II, 8: 322 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:273163-2.
This name was in version 1 of The Plant List, record kew-361281, and has not been changed.