Medicinal plants are a great source of economic value in Indian subcontinent.Nature has bestowed us a very rich botanical wealth. The medicinal properties of plants are attributed due to presence of several types of bioactive principles.Most of them are secondary metabolites of which 12,000 have been isolated,a number estimated to be less than 10% of the total. Herbal medicine is the mainstay of 75- 80% of whole population, mainly in developing countries for primary health care because of better cultural acceptability, better compatibility with the human body, bearable cost and fewer side...