This name is a synonym of Dactylorhiza majalis (Rchb.) P.F.Hunt & Summerh..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 55457) with original publication details: Acta Bot. Acad. Sci. Hung. 16: 368 1970 publ. 1971.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:887426-1.
This name was in version 1 of The Plant List, record kew-55457.