Wormwood (Artemisia absinthium) has a very bitter taste. It is a digestive with laxative effect too. It is used for preparation of various drinks.
For instance for wine, beer and tea as well.
In Morocco they use it with the tea in cold days, as it warms you up.
It has wide medicinal use too. The name "wormwood" comes from its use against parasites.
Recipes with wormwood.