This name is a synonym of Sanguisorba rupicola (Boiss. & Reut.) A.Braun & C.D.Bouch‚.
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 11287) with original publication details: ; 1966 66 1966.
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.