Cyathostemon is a genus of flowering plants in the myrtle family, Myrtaceae. The genus is endemic to southwestern Western Australia. Species include: \n* Cyathostemon ambiguus (F.Muell.) Rye & Trudgen \n* Cyathostemon blackettii (F.Muell.) Rye & Trudgen \n* Cyathostemon heterantherus (C.A.Gardner) Rye & Trudgen \n* Cyathostemon sp. Dowak \n* Cyathostemon sp. Lake King \n* Cyathostemon sp. Red Roo Rock \n* Cyathostemon sp. Salmon Gums \n* Cyathostemon tenuifolius Turcz.