This name is a synonym of Lamium album subsp. barbatum (Siebold & Zucc.) Mennema.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 454024) with original publication details: Acta Phytotax. Sin. 10: 157 1965.
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 Lamium barbatum in version 1 of The Plant List.