Castanedia is a monotypic genus of flowering plants in the Asteraceae, Asteraceae.[D.J.N.Hind & H.E.Robinson. 2007. Tribe Eupatorieae In: The Families and Genera of Vascular Plants vol.VIII. (Joachim W.Kadereit & Charles Jeffrey, volume editors. Klaus Kubitzky, general editor). Springer-Verlag. Berlin, Heidelberg.] It contains a single species, Castanedia santamartensis, a shrub endemic to the Sierra Nevada de Santa Marta of northeastern Colombia.[
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Both the genus and the species were circumscribed by Robert Merrill King and Harold Ernest Robinson in Phytologia vol.39 on page 58 in 1978.
The genus name of Castanedia is in honour of Rafael Romero Castañeda (1910–1973), who was a Colombian botanist and plant collector.
