Wormwood (in French, absinthe; in German, Wermut) is an herb with a perennial root system from which arise branched, firm, leafy stems that are almost woody at the base and reach a height of two to three feet. Its flowers are tiny, greenish-yellow and globular, and its indented leaves have a silvery-gray sheen. The species was cultivated from the Middle Ages to the early part of the 20th century.

Absinthe uncorked: The 'Green Fairy' was boozy -- but not psychedelic - http://www.physorg.com/news128693087.html