Olea europaea or the Fruiting Olive is a long lived, evergreen tree with beautiful, silvery grey/green foliage and a naturally slight weeping habit.
Its leaves are elongated oval and leathery, being lighter underneath (discolour) and it produces creamy-white flowers in spring that mature to green fruits in summer. These can be picked in autumn for pickling or left until winter when they are better for oil extraction.
This is the noble Olive, source of Ultra Virgin Olive Oil - the only way to fry, dress salads, sourdough dips or anything else that requires tasty oils.
Plant them in your garden while you are still young in order to be able to appreciate them all of your life (as they will live longer than you will).
They go best in the open ground but also can be grown in large tubs or planters.