This member of the Apocynaceae
family was described by Friedrich Martin Josef Welwitsch in 1869. It
is only found in a small area, called "The Half Men's Pass" in
Richtersveld, South Africa. It grows on the steep hills with little
water and lots of sun. The stem will grow up to 25 centimetres in
diameter and reach a height of three meters. The flowers are green
with a dark purple inside.
