The former Cronquist system of classification placed this family in the order Violales, but under more modern classifications systems such as that proposed by the Angiosperm Phylogeny Group, this is absorbed into the Malpighiales and the family has been expanded to include the former Malesherbiaceae and Turneraceae.
Head entity: Turneraceae
Tail entity: Passifloraceae
Relation (head \u2192 tail): taxon synonym
Inverse relation (tail \u2192 head): taxon synonym of