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Peraceae Klotzsch is a family of in the eudicot order Malpighiales. The family was segregated from the Euphorbiaceae by Johann Friedrich Klotzsch in 1859, and its uniqueness was affirmed by the Royal Botanic Gardens, Kew's Euphorbiaceae expert, Airy Shaw.
The family is accepted in APG IV (2016), but was not recognized in earlier Angiosperm Phylogeny Group III which considered that the recognition of the family may be necessary for a monophyletic Euphorbiaceae, but said that a formal recognition awaited additional molecular and morphological studies of the family.
The family includes 127 species in five genera: Chaetocarpus, Clutia, Pera, Pogonophora, and Trigonopleura, based on molecular and morphological characteristics.Annals of Botany, doi:10.1093/aob/mct056, Advances in the floral structural characterization of the major subclades of Malpighiales, one of the largest orders of flowering plants, Peter K. Endress, Charles C. Davis and Merran L. MatthewsWatson, L., and Dallwitz, M.J. 1992 onwards. The families of flowering plants: descriptions, illustrations, identification, and information retrieval. Version: 19 December 2012. http://delta-intkey.comWurdack & Davis, Malpighiales phylogenetics: gaining ground on one of the most recalcitrant clades in the angiosperm tree of life. American Journal of Botany, 96(8):1551-1570. 2009.
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