Caryodendron is a plant genus of the family Euphorbiaceae first described as a genus in 1860.Karsten, Gustav Karl Wilhelm Hermann. 1860. Florae Columbiae terraumque adjacentium specimina selecta in peregrinatione duodecim annorum observata delineavit et descripsit 1: 91-92 descriptions in Latin, commentary in GermanTropicos The genus includes C. orinocense, known as the Inchi tree or Tacay nut. It is native to Central America and South America.Kew World Checklist of Selected Plant FamiliesGovaerts, R., Frodin, D.G. & Radcliffe-Smith, A. (2000). World Checklist and Bibliography of Euphorbiaceae (and Pandaceae) 1-4: 1-1622. The Board of Trustees of the Royal Botanic Gardens, Kew.Burger, W.C. & M.J. Huft. 1995. Family 113. Euphorbiaceae. En: W. C. Burger (ed.), Flora Costaricensis. Fieldiana, Botany, n.s. 36: 1–169.Forzza, R. C. 2010. Lista de espécies Flora do Brasil . Jardim Botânico do Rio de Janeiro, Rio de JaneiroWebster, G. L. & M.J. Huft. 1988. Revised synopsis of Panamanian Euphorbiaceae. Annals of the Missouri Botanical Garden 75(3): 1087–1144 They are dioecious trees.Flowering Plants. Eudicots: Malpighiales. Germany, Springer Berlin Heidelberg, 2013.
Species Caryodendron amazonicum Ducke - Amazonas in Brazil Caryodendron angustifolium Standl. - Costa Rica, Panama, Colombia Caryodendron janeirense Müll.Arg. - Rio de Janeiro Caryodendron orinocense H.Karst - Colombia, Venezuela, Ecuador
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