Some more Bonsai styles
Broom style
This style is good for deciduous trees which have broad branching. The trunk is straight and upright, but does not grow to the top of the tree; branches grow out in all directions. This style helps to create a ball-shaped crown.
Literati
This very style is the sample of trees that have to struggle to survive. In nature this style of tree can be met in areas densely planted by many other plants and competition is so violent that the tree can survive only by growing taller then all other trees around it. The bare trunk of the tree grows awry upward because the sun is enough only for the top of the tree. Such trees are generally grown in small, round containers.
Double Trunk
The double trunk growing is frequently met in nature, but is not actually that usual in the Bonsai growing. As a rule, both trunks originate from one root system, but there is also possibility that the smaller trunk grows out of the larger one just above the ground. Both trunks differ in their thickness and length, the thicker and stronger trunk grows almost upright, while the smaller one will grow out a little bit frequent.
Roots over the rock
In nature trees grown in mountains and rocky areas have to search for good soil with their roots - and good soil is often found in clefts and holes. The roots are naked and unprotected, so this promotes to appearance of a special thick bark. The tree over the rock can also be grown in another style, although some styles may look unnatural.