This name is a synonym of Begonia rufa Thunb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 361681) with original publication details: Abh. Königl. Akad. Wiss. Berlin 1855: 159 1855.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:104729-1.
This name was in version 1 of The Plant List, record kew-361681.