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 and as an illegitimate name (record 36649) with original publication details: Nat. Arr. Brit. Pl. 2: 210 1821.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:622378-1.
This name was in version 1 of The Plant List, record kew-36649.