This name is a synonym of Begonia longipetiolata Gilg.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 361736) with original publication details: Ann. Mus. Congo Belge, Bot. V, 2: 319 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:104776-1.
This name was in version 1 of The Plant List, record kew-361736, and has not been changed.