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 166043) with original publication details: Naturaliste Canad. 71: 207 1944.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:210712-2.
This name was in version 1 of The Plant List, record kew-166043, and has not been changed.