The record derives from WCSP (in review) (data supplied on ) which reports it as a synonym with original publication details: Sitzungsber. Math.-Phys. Cl. Königl. Bayer. Akad. Wiss. München 8: 260 1878.
This name record (from WCSP (in review)) 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 Cardiospermum grandiflorum in version 1 of The Plant List.