Costmary Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Asterids Order: Asterales Family: Asteraceae Genus: Tanacetum Species: T. balsamita Binomial name Tanacetum balsamita
Tanacetum balsamita, or Balsamita vulgaris, is a perennial temperate herb known as costmary, alecost, balsam herb, bible leaf, or mint geranium.
It has been grown for many centuries for its pleasant, slightly medicinal or balsamic smell. It was used in medieval times as a place marker in bibles. It is referred to by Culpeper and others as the 'balsam herb'.  Leaves of the plant have been found to contain a range of essential oils. A Spanish study found the oil includes carvone as the main component (51.5%, 41.0% and 56.9% in three samples), together with minor amounts of beta-thujone, t-dihydrocarvone, c-dihydrocarvone, dihydrocarveol isomer c-carveol and t-carveol. It is noteworthy that levels of beta-thujone, a toxic ketone, were 9.8%, 12.5% and 12.1% in the respective samples. 
Nicholas Culpeper says of costmary:  It is under the dominion of Jupiter. The ordinary costmary, as well as maudlin, provokes urine abundantly, and softens the hardness of the mother; it gently purgeth choler and phlegm, extenuating that which is gross, and cutting that which is tough and glutinous, cleanseth that which is foul, and prevents putrefaction ; it openeth obstructions and relieves their bad effects, and it is beneficial in all sorts of dry agues. It is astringent to the stomach, and strengtheneth the livers other viscera : and taken in whey, worketh more effectively. Taken fasting in the morning, it relieves chronic pains in the head, and to stay, dry up, and consume all their rheums or distillations from the head into the stomach, a much to digest raw humours gathered therein, It is profitable for those that are fallen into a continual evil disposition of the body, called cachexy, especially in beginning of the disease. It is good for weak and cold livers. The seed is given to children for worms, and so is the infusion of flowers in white wine, about two ounces at a time. It maketh an excellent salve to heal old ulcers, being boiled with oil of olive, and adder's tongue with it; and after is strained, put in a little wax, rosin, and turpentine to make it as thick as required.
- Culpepers British Herbal - Pub. William Nicholson and Son - C. 1905 (re-print of the 1653 original)
- ISHS Acta Horticulturae 306: International Symposium on Medicinal and Aromatic Plants, XXIII IHC
- TANACETUM BALSAMITA L.: A MEDICINAL PLANT FROM GUADALAJARA (SPAIN), M.J. Pérez-Alonso, A. Velasco-Negueruela, A. Burzaco
This Asteroideae article is a stub. You can help Wikipedia by expanding it.