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 376852) with original publication details: Syn. Mitteleur. Fl. 3: 876 1907.
This name was in version 1 of The Plant List, record kew-376852.