Plants are an integral part of nature. Ever since the birth of man the plant kingdom has provided him with food, shelter and drugs. Plants are sophisticated factories where a variety of chemical compounds are manufactured. They are now recognized for the production of a large variety of chemicals. These plant-derived products are used as medicines, pesticides, perfumes, fragrances, etc. The Indian system of medicine, Ayurveda, makes use of plant kingdom very effectively and has stood the test of time. Phytochemical studies have become more encouraging with the advent of modern...