Welchiodendron is a genus of plant in the family Myrtaceae described as a genus in 1982.Wilson, Peter G. & Waterhouse, J.T., (1982) A review of the genus Tristania R.Br. (Myrtaceae): a heterogeneous assemblage of five genera. Australian Journal of Botany 30(4): 440-441Tropicos, Welchiodendron P. G. Wilson & J. T. Waterhouse It contains only one described species, Welchiodendron longivalve, commonly known as buttercup tree or yellow box penda, native to New Guinea and northern Cape York Peninsula, Queensland, Australia.
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