plant tissue outside the vascular cambium or the xylem; in older trees may be divided into dead outer bark and living inner bark, which consists of secondary phloem. external parenchymal tissue, located just below the epidermis of the stem
the bark of a Monterey Pine

Bark is the covering of the stems of woody plants, like trees. Bark protects the tree. Bark of different plants and trees can look very different, it can be rough or smooth and can have different colors. It is the outer layer of tree trunks.

Most of the bark grows from the vascular cambium. Some outer parts of the bark sometimes come from a cork cambium.