This name is a synonym of Begonia caroliniifolia Regel.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 362873) with original publication details: Mexic. Begon. 11 1852.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:105610-1.
This name was in version 1 of The Plant List, record kew-362873, and has not been changed.