It is normally called the tree's bark.
Bark
the outer covering of the tree's trunk and limbs.
the outer covering of the tree's trunk and limbs.
The outside covering of a tree trunk is called bark.
Trunk of any tree is its heart. In other words, It contains number of xylem and phloem which nourishes all the leaves of a plant. Outer covering of trunk serves the function of protection.
A tree trunk.
It should be in the backwall of the trunk behind the outer covering. Carefully remove this and you will see multiple boxes attached.
the outer part of a tree trunk
The outer protective covering of a tree is called the bark
Trees have one trunk.
Trees have a trunk, flowers have a stem.
the outer part of a tree trunk
the outer part of a tree trunk