Centaurea jacea subsp. pratensis (W.D.J.Koch) Čelak. accepted as Centaurea thuillieri (Dostál) J.Duvign. & Lambinon (original description)
Hieracium laevigatum subsp. gothicum (Fr.) Čelak. (original description)
Hieracium laevigatum subsp. rigidum (Hartm.) Čelak. (original description)
Hieracium laevigatum subsp. tridentatum (Fr.) Čelak. (original description)
Hieracium pallidifolium Čelak. accepted as Hieracium chlorocephalum R.Uechtr. (original description)
Leontodon hastilis subsp. glabratus (W.D.J.Koch) Čelak. accepted as Leontodon hispidus subsp. hastilis (L.) Corb. accepted as Leontodon hispidus subsp. hastilis (L.) Pawłowska (original description)
Senecio nemorensis subsp. jacquinianus Čelak. (original description)
Senecio paludosus subsp. bohemicus (Tausch) Čelak. accepted as Jacobaea paludosa (L.) G.Gaertn., B.Mey. & Scherb. (original description)
Senecio paludosus subsp. tomentosus Čelak. accepted as Jacobaea paludosa (L.) G.Gaertn., B.Mey. & Scherb. (original description)