This name is a synonym of Ajuga chamaepitys subsp. laevigata (Boiss.) P.H.Davis.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 5271) with original publication details: Labiat. Gen. Spec. 700 1835.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:444579-1.
This name was in version 1 of The Plant List, record kew-5271, and has not been changed.