Piaranthus geminatus, a very diverse species with many flower sizes and shapes.
Orbea lutea - Yellow Carrion Flower is a succulent perennial with green (in full sun are mottled maroon to purple)
Stapelia flavopurpurea of Asclepiadaceae family
The leafless Stapelia pulchellus is a succulent plant endemic to Africa and Asia. It bears a very large and uniquely-patterned flower – one of the largest of flowers to be found on any species of succulent.