This name is a synonym of Ajuga japonica Miq..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 27801) with original publication details: Revis. Gen. Pl. 2: 512 1891.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:445254-1.
This name was in version 1 of The Plant List, record kew-27801, and has not been changed.