Didymocistus is a genus of plants in the family Phyllanthaceae first described as a genus in 1940.Kuhlmann, João Geraldo. 1940. Anais Reunião Sul-Americana de Botânica 3: 82Tropicos, Didymocistus Kuhlm. It contains only one known species, Didymocistus chrysadenius, native to the Loreto region of northeastern Peru, the Amazonas Department of southeastern Colombia, and the State of Amazonas in northwestern Brazil.Kew World Checklist of Selected Plant FamiliesTropicos, specimen list for Didymocistus chrysadenius Kuhlm.Levin, G. A. 1986. Systematic foliar morphology of Phyllanthoideae (Euphorbiaceae). I. Conspectus. Annals of the Missouri Botanical Garden 73(1): 29–85Brako, L. & J. L. Zarucchi. (eds.) 1993. Catalogue of the Flowering Plants and Gymnosperms of Peru. Monographs in systematic botany from the Missouri Botanical Garden 45: i–xl, 1–1286 It is dioecious, with male and female flowers on separate plants.
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