The record derives from TICA
(data supplied on )
which reports it as a synonym (record
2DFBE121-EFC4-45AE-BD5A-7C0CBA9F4E0D) with original publication details: "C.E.O. Kuntze, Revis. Gen. Pl. 1. 1891" 345 1891.
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 Hieracioides pannonicum in version 1 of The Plant List.