This web address takes you to the electronic version of the 2003 Red List of Threatened Species produced by the IUCN Species Survival Commission. Red List categories and criteria are used to provide information on conservation status and distribution. These categories and criteria are explained in detail and aid the understanding of many terms, e.g. Vulnerable, that are often used incorrectly.
The list is designed to catalogue and highlight those species that are facing the risk of extinction so that efforts can be made to protect them. From an educational point of view, this site is a reliable information source of species status and distribution and as such is helpful with conservation interpretation. http://www.iucnredlist.org/
Some plants are included in this list and are subsequently categorized with the 2003 criteria. However, the 1997 IUCN Red List of Threatened Plants can be found on the UNEP World Conservation Monitoring Centre site that also gives CITES (Convention on International Trade of Endangered Species of Fauna and Flora) listings. http://www.unep-wcmc.org/