This member of the Asclepiadaceae* family was given this name by Hans Schinz in 1888. It is found in Angola, Botswana, Mozambique, Namibia, Tanzania, Zambia and Zimbabwe, growing in a well drained soil with some water and some sun. The caudex can grow to twelve centimetres, the whole plant up to 55 centimetres. The flowers are from light greenish over yellow to orange.
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 for the spear-shaped leaves. * Accordantly to the latest taxonomic system; APG IV 2016, Asclepiadaceae is now part of the Apocynaceae. Another flower by B. T. Wursten, Zambiaflora.com. The leaves by B. T. Wursten, Zambiaflora.com.

