The is commonly called bark.
epidermis
periderm
cuticle
vascular cambium

The correct answer should be the Periderm.

It is not as simple as this, of course and you would be wise to know that periderm is just a part of the overall concept that is bark, because bark is not a biological term.

In what ways did the Romans limit the political power of any one man? What they did was the consul could veto, or reject, the actions of the other consul. How did Roman political structures limit the influence of the poor? It limited the influence of the poor by not letting the plebeians join the Roman Senate.