This name is a synonym of Dactylorhiza romana subsp. guimaraesii (E.G.Camus) H.A.Pedersen.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 55596) with original publication details: Bot. J. Linn. Soc. 76: 366 1978.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:626687-1.
This name was in version 1 of The Plant List, record kew-55596, and has not been changed.