Tarragon is an herb which is especially known from the classical (French) kitchen. It originates from Central Asia and is in Europe for culinary use since the Middle Ages. Both the leafs as the flowers can be used for consumption.
Oregan has a spicy, light sweet, taste and smells really flavoured. It is one of the most important substances from pizza herbs. In Mexico, oregan and chile powder are the main ingredients of chile con carne spices.