This name is a synonym of Plectranthus thyrsoideus (Baker) B.Mathew.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 46132) with original publication details: Bot. Mag. 125: t. 7672 1899.
This name was in version 1 of The Plant List, record kew-46132, and has not been changed.