This name is a synonym of Rosa caesia subsp. vosagiaca (N.H.F.Desp.) D.H.Kent.
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 855) with original publication details: ; .
This name record (from RJP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Rosa dumalis in version 1 of The Plant List.