This name is a synonym of Dactylorhiza majalis subsp. sphagnicola (Höppner) H.A.Pedersen & Hedrén.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 55357) with original publication details: Europ. Medit. Orchid. ed. 3: 40 1980.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:919461-1.
This name was in version 1 of The Plant List, record kew-55357, and has not been changed.