This great little tree is not used often enough in our area.  It reaches 20 feet (although most are smaller) with a spread of about 12 feet.  It is covered much of the summer with showy white flowers when provided with good water.  The fruit is a favorite wildlife food and is said to be edible to humans when made into a jelly to treat coughs and colds.  The name derives from the appearance of the fruit which look much like olives when ripening but otherwise have no relationship to true olives.