This name is a synonym of Begonia saxicola A.DC..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 361176) with original publication details: Arch. Jard. Bot. Rio de Janeiro 15: 37 1957.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:30440-2.
This name was in version 1 of The Plant List, record kew-361176, and has not been changed.