WHO/IUCN/WWF Guidelines on the Conservation of Medicinal Plants

Over the last decade or so, the World Health Assembly has passed a number of resolutions in response to a resurgence of interest in the study and use of traditional medicine in health care, and in recognition of the importance of medicinal plants to the health systems of many developing countries. This great surge of public interest in the use of plants as medicines has been based on the assumption that the plants will be available on a continuing basis. Today many medicinal plants face extinction or severe genetic loss, but detailed information is lacking.

http://apps.who.int/medicinedocs/en/m/abstract/Js7150e/