Echidnopsis nubica Family: Apocynaceae (Asclepidaceae). A rarely seen species from Sudan which has the tiniest flowers of all Stapeliads.The plant itself seems lighter green than most Echidnopsis, especially at the base. It has shorter, more numerous branches than the typical Echidnopsis (e.g. E. cereiformis). The flowers are reddish brown with a bright yellow center. The petals open about half way. Like most Echidnopsis, the flowers are very tiny.
People tend to shy away from Stapeliads because of their reputation for being rot prone, but actually they are simple to grow. Give lots of light, but protect from hot afternoon sun in summer. During the growing season they can be watered as much as any other succulent (i.e. regularly but don't let the soil stay wet). In the winter keep totally dry unless you are growing it in a greenhouse. Cool and wet or low light and wet are what rot this and all other Stapeliads. Cool and dry or low light and dry in the winter and you should be fine. Stem cuttings root easily.