Another flower by B. T.
The leaves by B. T. Wursten, Zambiaflora.com.
This member of the
Asclepiadaceae* family was given this name by Hans Schinz in 1888. It
is found in Botswana, Mozambique, Namibia, Tanzania, Zambia and
Zimbabwe, growing in a well drained soil with some water and some
sun. The caudex can grow to 12 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.