The Stump or Turtle "Korabuki" style of bonsai trees is a rare and unusual style that resembles a tree stump or turtle shell. It is inspired by the natural swelling of the roots of some ficus species, which form a bulgy base that supports multiple trunks. The number of trunks in a Korabuki bonsai is always uneven, and they never cross each other. The trunks are usually thin and straight, with sparse foliage at the top. The Korabuki style is closely related to the clump style, but it emphasizes the shape and texture of the root base more than the branches .