This name is a synonym of Dactylorhiza traunsteineri subsp. curvifolia (F.Nyl.) Soó.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 55228) with original publication details: Sosud. Rast. SSSR 307 1981.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:984741-1.
This name was in version 1 of The Plant List, record kew-55228.