This is a Stapelia scitula! Stapelia/Huernia and related genera are known for their alien-like flowers that smell like rot and decay. They’re pollinated by flies who are attracted to the smell. This particular specimen has its own special corner of the greenhouse when it flowers.
Bryophyllum fedtschenkoi ‘Marginata’ (left) and ‘Aurora Borealis’. They’re usually sold as Kalanchoe, and there seems to be some confusion regarding cultivar names too. These guys go semi-dormant in the heat of our summers and rebound in the fall. Cooler weather later in the season brings out pink and lavender tones.
Kihaku-Gato's Garden Blog (tumblr import) 