This name is a synonym of Begonia biserrata Lindl..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 361090) with original publication details: Contr. Gray Herb. 154: 23 1945.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:30415-2.
This name was in version 1 of The Plant List, record kew-361090.