Photo used with permission of author Kasia Babis.

The purpose of the compound in the bark is not known.

Fibre The fibres in kenaf are found in the bast (bark) and core (wood).

It overlays the wood and consists of the inner bark and the outer bark.

Older phellem cells are dead, as is the case with woody stems.

In wood, the vascular cambium is the obvious line separating the bark and wood.

Conquered by the Romans in 311 BC, Arretium became a military station on the via Cassia, the road to expansion by republican Rome into the basin of the Po.

The inner bark, which in older stems is living tissue, includes the innermost area of the periderm.

The inhibitors are strongest in the bark and roots, but are also present in the leaves, wood and seeds of the plant.

At the time of this writing, the poster has more than 3,000 likes on Facebook and more than 1,800 shares, including one by noted libertarian and Wikipedia founder Jimmy Wales.

Somebody said the test we're facing now, a scientist told me, is whether the combination of an opposable thumb and a neocortex is a viable combination.

In traditional African practice, the bark is made into tea, whereas elsewhere in the world it is found in powders, tinctures, and pills.

In some places, such as the Šumava National Park in the Czech Republic's Bohemian forest, problems with bark beetles have become a heated issue with an international political dimension.

The outer bark in older stems includes the dead tissue on the surface of the stems, along with parts of the innermost periderm and all the tissues on the outer side of the periderm.

So that white material that you see in between the bark and the wood is the mycelial felt of the fungus, and what it's doing it's actually slowly strangling the tree to death by preventing the flow of water and nutrients.

Courtesy of the fungus, ambrosia bark beetles are able to indirectly feed from many more species of trees than their evolutionary relatives that do not feed on fungi, by having the fungi do the work of overcoming the plants' chemical defenses.

Unusually for a bird, the brown headed nuthatch uses a piece of tree bark as a lever to pry up other bark flakes to look for food the bark tool may then be carried from tree to tree or used to cover a seed cache.