This member of the Euphorbiaceae family was given this name by Nicholas Edward Brown in 1915. It is found in southern South Africa, growing in a well drained soil with some water and lots of sun. The caudex can grow to seven centimetres in diameter, the entire plant to fifteen centimetres in height. The flowers are yellow. The genera is named after Euphorbos, the Greek physician of King Juba II of Numidia. The species is named after John Muir,1874 - 1947, a Scottish physician and naturalist who emigrated to South Africa and found this plant.

