This name is a synonym of Begonia cubensis Hassk..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 362134) with original publication details: Ann. Sci. Nat., Bot. IV, 11: 123 1859.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:105055-1.
This name was in version 1 of The Plant List, record kew-362134, and has not been changed.