This member of the Asclepiadaceae family was given this name by Robert Allen Dyer in 1942. It is found in Botswana, Eswatini, Lesotho, Namibia, South Africa and Zimbabwe, growing in a well drained soil with quite some water and some to lots of sun. The caudex can grow to 15 or even 40 centimetres in diameter, the entire plant to 20 centimetres in height. The flowers are pink to purple with a white centre.
The genera name from Greek rhaphis; 'beet-root' and akme; 'sharpness' possibly referring to the taste of the roots - haven't tried yet. The species name referring to the the small hairs. *)Accordantly to the latest taxonomic system; APG IV 2016, Asclepiadaceae is now part of the Apocynaceae.

