This name is a synonym of Lavatera triloba subsp. agrigentina (Tineo) R.Fern..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Pl. Rar. Sicil. Pugill. 1: 13 1817.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:561171-1.
This name was in version 1 of The Plant List, record kew-2494401.