This name is a synonym of Mentha longifolia (L.) L..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 124851) with original publication details: Magyar Fl. 920 1925.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:450664-1.
This name was in version 1 of The Plant List, record kew-124851.