This name is a synonym of Prunella vulgaris subsp. lanceolata (W.P.C.Barton) Piper & Beattie.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 166021) with original publication details: Amer. Bot. (Binghamton) 24: 84 1918.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:210702-2.
This name was in version 1 of The Plant List, record kew-166021, and has not been changed.