This name is a synonym of Gladiolus grandiflorus Andrews.
The record derives from iPlants
(data supplied on 2012-03-23)
which reports it as a synonym (record 327568) with original publication details: Bot. Mag. 96: t. 5877 1870.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:437114-1.
This name was in version 1 of The Plant List, record kew-327568, and has not been changed.