This name is a synonym of Begonia ulmifolia Willd..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 361391) with original publication details: Ann. Sci. Nat., Bot. IV, 11: 127 1859.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:104517-1.
This name was in version 1 of The Plant List, record kew-361391, and has not been changed.