This name is a synonym of Isodon rubescens (Hemsl.) H.Hara.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 454019) with original publication details: Mem. Fac. Sci. Taihoku Imp. Univ. 2: 123 1929.
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Isodon henryi in version 1 of The Plant List.