Though the native origin of Hops was probably Asia, they are now common in northern Europe. In the past, it was known as Devil's Wood, because it climbed up trees at the speed of a thousand devils and always counter-clockwise. Hops was introduced into France in the 12th century. The cone-shaped fruits are rich in essential oils, which have sedative and hypnotic properties. It is frequently used to treat anxiety and depressive states. Hops contain active principles that are precursors to vitamin D.