This name is a synonym of Geum × thomasianum Ser..
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 43738) with original publication details: Flore de France Flore de France; 1893 163 1900.
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 Geum silvatico-rivale in version 1 of The Plant List.