This name is a synonym of Begonia montana (A.DC.) Warb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 361689) with original publication details: Phytologia 27: 214 1973.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:30584-2.
This name was in version 1 of The Plant List, record kew-361689, and has not been changed.