This name is a synonym of Gastrorchis lutea subsp. longibracteata (S.Moore) P.Bernet.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 151038) with original publication details: Fl. Réunion 226 1895.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:650428-1.
This name was in version 1 of The Plant List, record kew-151038.