Arctium nemorosum f. mathei Soó accepted as Arctium nemorosum Lej. (original description)
Centaurea macroptilon subsp. oxylepis Soó accepted as Centaurea oxylepis (Wimm. & Grab.) Hayek (original description)
Centaurea scabiosa f. dostalii Soó (original description)
Centaurea scabiosa f. subheterophylla Soó (original description)
Cirsium vulgare f. erdneri Soó accepted as Cirsium vulgare (Savi) Ten. (original description)
Senecio paludosus f. gymnocarpus Soó (original description)
Senecio paludosus f. hungaricus Soó (original description)
Sonchus asper f. adenotrichus Soó (original description)
Vernonia praestans var. cacuminis Borhidi & O.Muñiz (original description)