This member of the Euphorbiaceae family was given this name by Michael George Gilbert in 1990. It is found in south-central Ethiopia, growing in a well drained limestone soil with some water and some sun. The caudex can grow to five centimetres in diameter, the entire plant from 60 to 80 centimetres in height. The flowers are reddish. The genera is named after Euphorbos, the Greek physician of King Juba II of Numidia. The species is named after some nearby limestone caves; Sof Omar, 'Cave of Omar'.

