Achillea speciosa Hayek accepted as Tanacetum cadmeum (Boiss.) Heywood (original description)
Achillea zederbaueri Hayek accepted as Achillea aleppica subsp. zederbaueri (Hayek) Hub.-Mor. (original description)
Amphidoxa adscendens O.Hoffm. ex Zahlbr. accepted as Gnaphalium griquense Hilliard & B.L.Burtt (original description)
Centaurea zederbaueri Hayek accepted as Centaurea carduiformis DC. (original description)
Felicia amelloides O.Hoffm. ex Zahlbr. (original description)
Felicia bergeriana (Spreng.) O.Hoffm. ex Zahlbr. accepted as Felicia bergeriana (Spreng.) O.Hoffm. (original description)
Felicia elongata O.Hoffm. ex Zahlbr. (original description)
Felicia serrulata (Harv.) O.Hoffm. ex Zahlbr. (original description)
Lasiopogon brachypterus O.Hoffm. ex Zahlbr. (original description)
Nidorella angustifolia O.Hoffm. ex Zahlbr. (original description)
Nidorella krookii O.Hoffm. ex Zahlbr. (original description)
Scorzonera hieraciifolia Hayek (original description)
Taraxacum farinosum Hausskn. & Bornm. ex Hand.-Mazz. (original description)
Taraxacum pseudonigricans Hand.-Mazz. (original description)