Although there are hundreds of species of Ficus, there are a few that are popular with cactus and succulent collectors. These succulent caudex forming species originate in Mexico and depend on other trees or rock structures for their rigidity (bones,so to speak). A young Ficus palmeri may begin it's life high in a tall tree or steep cliff. It will send roots down the side of the tree or rock until it finds a water source. Once the water source is found, the Ficus will grow very quickly, expanding it's root tubers and trunk, which have storage capability. During drought the Ficus will drop it's large non-succulent leaves. However, when water returns, new fresh leaves will appear.

The two most popular succulent species, young F. palmeri and F. petiolaris make excellent bonsai displays and are usually mounted on rocks. They will stay small as long as your pot remains small.