This name is a synonym of Begonia micranthera Griseb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 362350) with original publication details: Phytologia 54: 467 1984.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:923032-1.
This name was in version 1 of The Plant List, record kew-362350.