This name is a synonym of Stachys kouyangensis (Vaniot) Dunn.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 17607281) with original publication details: Bull. Acad. Int. Géogr. Bot. 14(183): 175–176 1904.
This name record (from Tropicos) 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 kouyangensis in version 1 of The Plant List.