This name is a synonym of Laelia anceps subsp. dawsonii (J.Anderson) Rolfe.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 454740) with original publication details: Gard. Chron. III, 23: 124 1898.
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Laelia anceps in version 1 of The Plant List.