This name is a synonym of Rumex rugosus Campd..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26002500) with original publication details: Consp. Fl. Galic. Crit. 2: 118 1908.
This name record (from Tropicos) 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 Rumex carpathicus in version 1 of The Plant List.