This name is a synonym of Dactylorhiza cordigera subsp. bosniaca (Beck) Soó.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 465466) with original publication details: Nom. Nov. Gen. Dactylorhiza 5 1962.
This name record (from WCSP) 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 Dactylorhiza cordigera in version 1 of The Plant List.