Peraceae Klotzsch is a family of flowering plants in the eudicot order Malpighiales. The family was recognized in only a few systems of plant taxonomy, and was not recognized in the most widely accepted modern system, the Angiosperm Phylogeny Group III, although it is accepted in APG IV (2016). The family was segregated from the Euhporbiaceae by Johann Friedrich Klotzsch in 1859, and its uniqueness was affirmed by the Royal Botanic Gardens, Kew's Euphorbiaceae expert, Airy Shaw. The Angiosperm Phylogeny Group APG III system considers that the recognition of the family may be necessary for a monophyletic Euphorbiaceae, but also that a formal recognition awaited additional molecular and morphological studies of the family.