This name is a synonym of Rumex acetosella subsp. pyrenaicus (Pourr. ex Lapeyr.) Akeroyd.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Prodr. Fl. Hispan. 1: 284 1862.
This name was in version 1 of The Plant List, record kew-2869522, and has not been changed.