Carduus semiensis Pic.Serm. accepted as Carduus leptacanthus Fresen. accepted as Afrocarduus leptacanthus (Fresen.) Garcia-Jacas, Moreyra & Susanna (original description)
Conyza messerii Pic.Serm. (original description)
Echinops francinianus Pic.Serm. accepted as Echinops giganteus A.Rich. (original description)
Echinops nistrii Pic.Serm. accepted as Echinops giganteus A.Rich. (original description)
Senecio degiensis Pic.Serm. accepted as Senecio farinaceus Sch.Bip. ex A.Rich. (original description)
Vernonia chiarugii Pic.Serm. accepted as Gymnanthemum myrianthum (Hook.f.) H.Rob. (original description)