Conyza pusilla Houtt. (original description)
Cotula pumila Houtt. accepted as Cotula turbinata L. (original description)
Erigeron capensis Houtt. accepted as Hilliardiella pinifolia (Less.) H.Rob. (original description)
Ethulia paniculata Houtt. accepted as Dichrocephala integrifolia (L.f.) Kuntze (original description)
Gnaphalium aureum Hoult. (original description)
Prenanthes laciniata Houtt. accepted as Lactuca indica L. (original description)
Prenanthes lanceolata Houtt. accepted as Crepidiastrum lanceolatum (Houtt.) Nakai (original description)
Spilanthes atriplicifolia Houtt. (original description)