Anthemis panachaica Halácsy accepted as Anthemis cretica subsp. panachaica (Halácsy) Oberpr. & Greuter (original description)
Aster cylleneus (Boiss. & Orph.) Halácsy accepted as Aster alpinus subsp. cylleneus (Boiss. & Orph.) Hayek (original description)
Carduus leiophyllus var. vestitus Halácsy accepted as Carduus nutans subsp. leiophyllus (Petrovič) Stoj. & Stef. (original description)
Centaurea brunnea (Halácsy) Halácsy (original description)
Centaurea epirotica (Bald.) Halácsy accepted as Centaurea ptarmicoides Halácsy (original description)
Centaurea thessalonica Halácsy accepted as Centaurea macedonica Boiss. (original description)
Centaurea ustulata Halácsy accepted as Centaurea albanica Halácsy (original description)
Crepis tubaeformis Halácsy accepted as Crepis dioscoridis L. (original description)
Hieracium aetolicum Halácsy accepted as Hieracium gaudryi subsp. sibthorpianum Zahn (original description)
Onopordum messeniacum Halácsy (original description)