People all around world are heading towards the herbal medicine. Because of the high costs involved with manufacturing modern medicines, many people living in developing nations simply do not have the financial resources to pay for them, and as a result, they are forced to use natural herbs as an affordable alternative. Moreover it has no side effects and easier to get it.
Originally they were found in the wild, by the gatherers (of hunter-gatherer groups) and used for a lot of different things.
They were used to flavor food, as a source of nutrition, as medicines and for magical purposes.
Before there were doctors, herbs were used by the "wise women & men" of small bands of people... very often with good, reliable results.
This app contains a lot of information on herbs. It also deals with various types of herbs and its uses.