This name is a synonym of Mentha cunninghamii (Benth.) Benth..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 127177) with original publication details: Labiat. Gen. Spec. 730 1835.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:451750-1.
This name was in version 1 of The Plant List, record kew-127177, and has not been changed.