This name is a synonym of Lamium galeobdolon subsp. argentatum (Smejkal) J.Duvign..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 107453) with original publication details: Leiden Bot. Ser. 11: 46 1989.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:955424-1.
This name was in version 1 of The Plant List, record kew-107453, and has not been changed.