Branch

Due to a broad range of species of trees, branches and twigs can be found in many different shapes and sizes.

A number of mathematical properties are associated with tree branchings; they are natural examples of fractal patterns in nature, and, as observed by Leonardo da Vinci, their cross-sectional areas closely follow the da Vinci branching rule.

[6] Other words for twig include branchlet, spray, and surcle, as well as the technical terms surculus and ramulus.

Some branches from specific trees have their own names, such as osiers and withes or withies, which come from willows.

Thin, flexible sticks are called switches, wands, shrags, or vimina (singular vimen).