About trees;

In botany a tree is a perennial plant with an elongated stem,or trunk supporting branches and leaves in most species.In some usages,the definition of a tree may be narrower, including only woody plants with secondary growth,plants that are usable as lumber or plants above a specified height.In wider definition,the taller palms,tree ferns, bananas,and bamboos are also trees.

A tree typically has many secondary branchi supported clear of the ground by the trunk.This trunk typically contains woody tissue for strength,and vascular tissue to carry materials from one part of the tree to another.