Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct. Class Magnoliopsida Brongn. (1843) Subclass Ranunculidae Takht. ex Reveal (1992) see Order Ranunculales Juss. ex Bercht. & J.Presl (1820) Superorder Ranunculanae Takht. ex Reveal (1992) Order Ranunculales Juss. ex Bercht. & J.Presl (1820) Family Ranunculaceae Juss. (1789), nom. cons. - buttercup family Subfamily "Trolliodeae" nom. null. see Subfamily Trollioideae Tribe Trollieae see Tribe Helleboreae DC. (1817) Genus Caltha L. (1753)