The foliage has a sweet
resinous scent and is a traditional
insect repellent, used by campers to keep biting insects out of tents. It is also a traditional component of royal wedding bouquets and is used variously in perfumery and as a
condiment. In
Scotland, UK, it has been traditionally used to ward off the
Highland midge, and it is marketed as an insect repellent and as an ingredient in some soaps.
Food and medicine Dried leaves and fruits have been used as a spice in soups and stews and as a flavouring for beer; roots and bark are used as a source of yellow dye for calfskin and wool; catkins and fruits as a source of wax for candles; and leaf and fruit infusions as an insecticide. It has been also used in traditional medicine as a remedy for stomach and cardiac disorders. Its volatile oil also has a role in resistance to fungal pathogens. The leaves can be dried to make tea, and both the nutlets and leaves can be used (either chopped or dried) to make a seasoning. In northwestern Europe (Germany, Belgium and the Netherlands), it was much used in a mixture called
gruit as a flavouring for beer from the
Middle Ages to the 16th century, but it fell into disuse after
hops supplanted gruit herbs for political and economic reasons. In modern times, some brewers have revisited this historic technique and in Denmark and Sweden the plant is commonly used to prepare home-flavoured
schnaps. In some
native cultures in
Eastern Canada, the plant has been used as a traditional remedy for stomach aches, fever, bronchial ailments, and liver problems. In 2007, there were plans to increase production of the plant in Scotland for use as an
essential oil for treating sensitive skin and
acne. ==In culture==