Blumea kelleri Thell. accepted as Pluchea kelleri (Thell.) Thulin (original description)
Blumea somaliensis Thell. accepted as Pluchea somaliensis (Thell.) Thulin (original description)
Dimorphotheca turicensis Thell. (original description)
Gerbera conrathii Thell. accepted as Gerbera viridifolia (DC.) Sch.Bip. (original description)
Gerbera glandulosa Thell. accepted as Gerbera viridifolia (DC.) Sch.Bip. (original description)
Nicolasia costata (Klatt) Thell. (original description)
Nicolasia quinqueseta O.Hoffm. ex Thell. accepted as Nicolasia nitens var. nitens (O.Hoffm.) Eyles (original description)
Phymaspermum equisetoides Thell. (original description)
Senecio pseudorhyncholaenus Thell. accepted as Senecio subrubriflorus O.Hoffm. (original description)
Vernonia pseudocorymbosa Thell. accepted as Gymnanthemum crataegifolium (Hutch.) H.Rob. (original description)