Wormwood - Artemisia spp.

Absinth wormwood - Artemisia absinthium
It has tiny yellow flowers and whitish, downy, lobed leaves. It contains many active ingredients in the form of varying terpines and etheric oil. The oil contains alpha and beta thujone, which should not be taken in excess.
Wormwood has been used since time immemorial for indigestion and gall bladder illnesses. It is not effective against gall bladder attacks. Wormwood is, however, a specific aid for depressive, labile people with changeable indegestion, periodic loss of appetite, and weak alimentary organs. The condition is often accompanied by high blood pressure.
Since the herb strengthens the immune system, it is taken for influenza and to aid convalescence after infectious diseases and surgical treatment.
Wormwood tea is very bitter and should be consumed very hot after a meal. The treatment should not exceed 3 to 4 weeks. If the patient cannot drink tea, wormwood tinkture can be administered. 20 to 30 drops in half a glass of water is standard dose, which can be taken 3 times a day.
Tea is made with a teaspoonful of dried herb in a mug of boiling water. Leave it to draw for 10 minutes. This tea is a vermifuge if simultaneously used as an enema.
Wormwood should not be taken if pregnant.
Sweet wormwood
There is also Sweet wormwood (Artemisia annua) which is a good against malaria. This is especially because of the plant's content of the substance artemisinin. Artemisinin is a peroxide, which means that it contains two oxygen atoms, which are released by the iron in red blood cells and become free oxygen radicals, which, in turn, kill the parasites. Such a method of action will probably not lead to development of resistance either.
Other species
Common wormwood (Artemisia vulgaris), should not be confused with its close relative Absinth wormwood, which is of quite similar appearance. Both vermouth and absinth have been named after wormwood.