This name is a synonym of Begonia dregei Otto & Dietr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 362882) with original publication details: Prodr. 15(1): 384 1864.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:105619-1.
This name was in version 1 of The Plant List, record kew-362882.