Long before drugs were invented, India and China were relying on herbs found in nature to treat a variety of ailments. This knowledge is still preserved and put to use.

https://en.wikipedia.org/wiki/Ayurveda. Ayurveda is a one of the oldest holistic healing systems in the world which originated in India. Read about the history, principles and practice of Ayurveda in this article.
a href=”http://www.iloveindia.com/indian-herbs/” target=”_blank”>http://www.iloveindia.com/indian-herbs/. This site provides an exhaustive list of herbs found in India. They give a brief description of each herb, and information on their uses and benefits. They also provide write-ups on natural remedies for common conditions.
http://www.greenmedinfo.com/blog/40-important-herbs-used-korku-tribes-india-2 . The Korku tribe of central India still rely on age old herbal remedies to treat the people in their community. Dr.Deepak Acharya has created a database of 40 important herbs used by the Korku tribe.
http://www.itmonline.org/arts/herbintro.htm. This article provides an introduction to Chinese herbs and briefly looks at its practice in China and the United States. The writer has also compiled a list of 15 commonly used Chinese herbs.
http://www.shen-nong.com/eng/herbal/list.html. This website explains in detail the concepts, theories and systems of Chinese medicine. It contains an exhaustive list of ailments and traditional herbal and non-herbal treatments for each. It also outlines traditional Chinese diets that may combat common health conditions.