This name is a synonym of Dactylorhiza majalis var. kerryensis (Wilmott) R.M.Bateman & Denholm.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 100362241) with original publication details: Jahresber. Naturwiss. Vereins Wuppertal 21–22: ? 1968.
This name was in version 1 of The Plant List, record tro-100362241.