Peucedanum ostruthium or Imperatoria ostruthium, masterwort,[2] is a species of flowering plant in the familyApiaceae. It is native to the mountains of Central and Southern Europe, but has been widely introduced outside its native range.
Masterwort is used as a flavouring for various liqueurs and bitters. Its roots and leaves have been used in the traditional Austrian medicine internally (as tea, liqueurs and wine) and externally (as fumigation, tincture or incense) for treatment of disorders of the gastrointestinal tract, skin, respiratory tract, cardiovascular system, infections, fever, flu and colds.[4]