Wormwood (Artemisia absinthium) is a perennial aromatic herb in the daisy family (Asteraceae) native to Europe, North Africa, and temperate Asia. It has silvery-gray divided leaves, a strongly bitter taste, and a penetrating herbal aroma. The leaves and flowering tops are the parts most often used in traditional preparations.
In traditional Western herbal practice, wormwood has long been associated with bitter digestive formulas and tonic preparations. It has also been linked historically with classic aperitif bitters and with the history of absinthe, though the herb itself is far older than that association.
Because wormwood is intensely bitter and chemically active, it is one of the herbs most often described as requiring measured use and thoughtful handling.

