This name is a synonym of Begonia domingensis A.DC..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 361460) with original publication details: Repert. Spec. Nov. Regni Veg. 18: 192 1922.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:30514-2.
This name was in version 1 of The Plant List, record kew-361460, and has not been changed.