Joe-Ann McCoy prepared an extensive document with links to a wide variety of resources pertaining to plant identification, preparation of voucher specimens, and quality control of the plant material collected or cultivated. This information is valuable to wild-harvesters and growers. Product manufacturers should also review this information so they are knowledgeable about the raw material they purchase. You can view this file or download it. It is a pdf document, but all the links are live. For people with disabilities, if more information is needed, please contact the author for a Word document version.