Triple trunk style – This has three, five, or seven trunks of different trunk diameters growing from a single root ball. If there are three trunks of differing diameters, it is referred to as a father, mother, son arrangement. Slender trunk trees, such as maples and elms, are best suited to this style.
In nature, trees are forced into all kinds of shapes under the influences of weather, wind and placement. Consequently, bonsai trees can have many shapes and sizes and, depending on their way of growing, they are grouped into various styles and shapes.
Maybe some shapes seem strange and unnatural, but they are all based on the way trees grow in nature. Each tree, however, has its own character and within a certain style there is still an enormous variety. Usually a bonsai tree is given its name according to its shape or the number of trunks it has.