This name is a synonym of Calibrachoa excellens (R.E.Fr.) Wijsman.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 29600996) with original publication details: Kongl. Svenska Vetensk. Acad. Handl. 34(5): 63 1911.
This name was in version 1 of The Plant List, record tro-29600996.