The record derives from TICA
(data supplied on )
which reports it as a synonym (record
CA762EA3-30E5-4AEC-9A1D-6AC69E375A46) with original publication details: "Sloboda, Rostlinnictví. 1852" 452 1852.
This name record (from TICA) 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 Barkhausia rigida in version 1 of The Plant List.