The record derives from TICA
(data supplied on )
which reports it as a synonym (record
F3AA6CEA-9264-412C-B980-596F7F1CCE09) with original publication details: Flora von Nieder-Osterreich 2(2): 1200 1893.
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 Achillea pannonica in version 1 of The Plant List.