Chlorocyathus is a genus of plants in the Apocynaceae, first described in 1887.Oliver, Daniel. 1887. Hooker's Icones Plantarum 16: t. 1557 descriptions in Latin, commentary in English, with line drawing as illustration.Tropicos, genus Chlorocyathus It is native to southern Africa.Venter, Hendrik Johannes Tjaart. 2008. South African Journal of Botany 74: 289.

Species The Plant List, genus Chlorocyathus Chlorocyathus lobulata (Venter & R.L.Verh.) Venter - Bathurst District in Cape Province of South Africa Chlorocyathus monteiroae Oliv. - Maputo Bay (formerly Delagoa Bay) in southern Mozambique

formerly included moved to Raphionacme Chlorocyathus welwitschii (Schltr. & Rendle) Bullock, synonym of Raphionacme welwitschii Schltr. & Rendle

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