This name is a synonym of Isodon hispidus (Benth.) Murata.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 17607358) with original publication details: Acta Phytotax. Geobot. 24(4–6): 108–110, f. 5, 6 1970.
This name record (from Tropicos) 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 nigropunctata in version 1 of The Plant List.