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 5231) with original publication details: Denkschr. Kaiserl. Akad. Wiss., Wien. Math.-Naturwiss. Kl. 50: 50 1858.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:444551-1.
This name was in version 1 of The Plant List, record kew-5231.