This name is a synonym of Sanguisorba minor subsp. balearica (Bourg. ex Nyman) Mu¤oz Garm. & C.Navarro.
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 43576) with original publication details: ; 1957 289 1957.
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 Sanguisorba minor in version 1 of The Plant List.