There are difficulties regarding the classification of this genus for its affinities are uncertain. Further studies are needed to clarify its taxonomic and phylogenetic relationships. Many species were once considered part of
Wedelia but have been now transferred to other genera, including
Angelphytum, Aspilia, Baltimora, Blainvillea, Chrysogonum, Eclipta, Elaphandra, Eleutheranthera, Guizotia, Heliopsis, Kingianthus, Lasianthaea, Melampodium, Melanthera, Moonia, Sphagneticola, Synedrella, Tuberculocarpus, Verbesina, Viguiera, Villanova, Wollastonia and
Zexmenia. ==Species list==