This name is a synonym of Stachys byzantina K.Koch.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 71796) with original publication details: Fl. Portug. 1: 105 1809.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:446933-1.
This name was in version 1 of The Plant List, record kew-71796.