Tritaxis is a genus of plants under the family Euphorbiaceae first described as a genus in 1858. It is native to Southeast Asia, including parts of India, Sri Lanka, China Hainan, else into Philippines New Guinea, and Northern Australia (Queensland).Kew Plants of World Online Tropicos, Tritaxis Baill. Until recently, many species were listed under the genus Dimorphocalyx, first described as a genus several years later in 1861.Dimorphocalyx Thwaites, George Henry Kendrick. 1861. Enumeratio Plantarum Zeylaniae 278 descriptions in Latin, commentary in English Tropicos, Dimorphocalyx ThwaitesGovaerts, 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.Flora of China Vol. 11 Page 272 异萼木属 yi e mu shu Dimorphocalyx Thwaites, Enum. Pl. Zeyl. 278. 1861
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