This name is a synonym of Begonia koordersii Warb. ex L.B.Sm. & Wassh..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 362031) with original publication details: Natuurk. Tijdschr. Ned.-Indië 63: 91 1904.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:104976-1.
This name was in version 1 of The Plant List, record kew-362031, and has not been changed.