This name is a synonym of Isodon shikokianus var. intermedius (Kudô) Murata.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 102961) with original publication details: Mem. Fac. Sci. Taihoku Imp. Univ. 2: 305 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:448587-1.
This name was in version 1 of The Plant List, record kew-102961, and has not been changed.