This name is a synonym of Ajuga chamaepitys subsp. chia (Schreb.) Arcang..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 5219) with original publication details: Pl. Verticill. Unilab. Gen. Sp. 25 1774.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:444549-1.
This name was in version 1 of The Plant List, record kew-5219.