The olive tree or "Olea Europea" belongs to the family "Oleaceae", which primarily originates from the Mediterranean region and is one of the oldest culture and agricultural plants. The slowly growing wood of the tree is twisted and can reach a height of 20 meters, while its long roots can go 6 meters into the soil and provide the tree with water necessary for its growth. It tolerates drought but suffers from frost. Several years old, leaves are discarded throughout the year. Thus, the olive tree is an evergreen plant. Its slander lancet shaped leaves are leathery green on the upper side and silvery and shiny on the underside. Fine, star shaped hairs (star hairs) on the underside shield the leaves from dehydration. Water leaking from little openings in the leaves is caught and absorbed by the leaf again!