This member of the Apocynaceae family was given this name by Johann Friedrich Klotzsch in 1861. It is found in Eswatini, Malawi, Mozambique, South Africa, Zambia and Zimbabwe, growing in sandy or other well drained soil with some water and some to lots of sun. The swollen stem can grow to 25 or maybe even 35 centimetres in diameter, while it reach 50 to 300 centimetres in height. The flowers are from white to white and red. The genera is n amed after the Yemen city of Aden. The species after all the flowers. More flowers from Copenhagen BG. Big plant by Linda De Volder, Travaldo.blogspot.com.

