Tansy is a perennial weedy member of the sunflower family easily identified by its button-like golden flower tops. The plant is native to most of Europe and some parts of the Mediterranean.
At one time, tansy was used as flavoring in puddings, sweetmeats and in various alcoholic beverages. However, in the U.S., its use is restricted to alcoholic beverages.
Tansyalso contains a chemical compound that protects the plant from predators.