For a speculative evolution challenge over on DA. I thiiink it was about making bushes and trees out of Sedum, but you probably know alread I am about designing plants as people in Pringles ads are supposed to be about the advertised product.

S. solarium: Also known as sun-dial tree, it reaches up to 7 m in height and can be found across the northern island in different habitats.
S. lacrimosa: This small species is restricted to the rain-rich northeastern parts, where its drooping leaves allow the water to flow off easily.
S. halophilum: Adapted to a salt-rich environment, this plant is found along the western coasts. It stores salt in its old leaves, which will die and fall off. Unusual for Sedum, it is covered in dense white hair, which protects both from high insolation and heat as well as from the occasional flooding.
S. scutophyllum: Inhabiting the drier parts of the island, this species is more succulent than the ancestor stock of the island, resembling a pine cone in shape. It is mostly pollinated by beetles, which also seek shelter between the leaves.
S. coronatum: Just the island's native brand of a rosetta plant.
S. scrotum: While appearing similar to S. scutophyllum, S. scrotum has a thickened stem with its pattern being the result of leaf marks. It inhabits the drier inland parts of the southwestern section of the island, where water flows away quickly and washes nutrients away. Its unfortunate name is courtesy of G. Arendt, who said he had named the plant in honour of his physics professor.
S. papiliophilum: Its shape is fairly conservative, but the unusual part of this plant are its flowers, which are elongated and nectar-rich. The main pollinator are butterflies of the genus Parnassus, which is almost as diverse as Sedum on the island.
S. quasimodo: An inland species with an enlarged, wax-coated rhizome that stores water and nutrients. Anecdotes tell that its discoverer's first words upon seeing it were "This is a damn ugly plant". According to another anecdote he had said "I'm glad it isn't Arendt who will describe it".
S. caputmedusae: Analogous to S. quasimodo, this species developed an enlarged rhizome for storage. The bulb can reach up to a diameter of 30 cm, which is fairly small compared to S. quasimodo, which reaches a height slightly above 2 m.
S. repens: The creeping tree is a fairly common species. While with 4 m it doesn't grow very high, older specimens can get fairly wide due to its characteristic creeping stems.