Used in dry leaf and in flower form as a general tonic and as a mild sedative. Prevents and treats migraine headaches, improves digestion, used externally for bruises and insect bites. The plant produces an oil used in perfumes. The dried flowers are used to make a tea. Useful pest repellent planted amongst vegetables. Found growing wild in parts of Britain, more than likely introduced from the Continent. An attractive robust and quick growing plant. Perennial, Tanacetum parthenium