This name is a synonym of Dactylorhiza majalis subsp. baltica (Klinge) H.Sund..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 55407) with original publication details: Bot. Zhurn. (Moscow & Leningrad) 69: 875 1984.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:913900-1.
This name was in version 1 of The Plant List, record kew-55407.