The succulent jade plant (Crassula ovata) grows wild in its native southern Africa, where it can reach 8 to 9 feet tall and spread about as wide. This gives good advice for pruning...this is a plant material where you want the branches to removed flush to the plant instead of the usual concave cut. This is also another plant where pruning is the main tool for creating your Bonsai.
The portulacaria afra (dwarf jade, elephant jade, spekboom) is native to South Africa where they are part of the African elephant's diet. So it was only fitting to add an elephant to the dwarf jade bonsai forests. Notice the resemblance of the plant's bark to the skin of the elephant. Just like in the wild.