This name is a synonym of Dactylorhiza umbrosa (Kar. & Kir.) Nevski.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 55525) with original publication details: Nom. Nov. Gen. Dactylorhiza 4 1962.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:626655-1.
This name was in version 1 of The Plant List, record kew-55525.