There are many species of wild fig (Ficus sp.) trees.
This is one of the species growing on, or rather in, rocks.
Most are easy Bonsai specimens.
Commiphora sp. growing on rock. It seems small on the
photo but it was well over 2 meter high. This is a relative easy tree species to
grow as bonsai from seeds. It looks "old" while still young and it does
not die unless it is over watered.