A member of the Asclepiadaceae family. Here in a boggy grassland in Mecufi District of Mozambique, close to sea-level. I think it is Stathmostelma pedunculatum (first record in Mozambique?)..
This Stathmostelma species (S. pedunculatum , family Asclepiadaceae) grows in seasonally wet grassland. Here in Mecufi District of Northern Mozambique.