It is cultivated from Canada to Brazil and also found in waste places everywhere. In India, it is found in Khasi, Jaintia hills and Meghalaya. An annual herb. Extremely variable from 0.3 to 1.0m high, erect simple and then branching; pubescent stem. The leaves are thin, finely cut, opposite and alternating twice pinnatified, smooth above and hairy beneath. The flowers are greenish-white, appearing from July to October.It contains sesquiterpenes, lactones and ambrosic acid.A homoeopathic tincture is made from the whole plant. It is covered by Homoeopathic Pharmacopoeia of United States.It is used in hay fever, lachrymation and itching of eyelids and in summer diarrhea. An antipyretic. Its pollens are used as antigenic extraxts for hyposensitisation against allergies. Q. 1x, 3x and higher.Hay fever, lachrymation and itching of eyelids and in summer diarrhea.
||Dr. Willmar Schwabe