This name is a synonym of Cephalanthera longifolia (L.) Fritsch.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 70307) with original publication details: Kongl. Vetensk. Acad. Nya Handl. 21: 232 1800.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:633287-1.
This name was in version 1 of The Plant List, record kew-70307.