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The World Conservation Monitoring Centre provides information services on conservation and sustainable use of the world's living resources, and helps others to develop information systems of their own.
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1997 IUCN Red List of Threatened Plants
IUCN Red Data Book Categories
Please note that the threat status recorded here, is in accordance with the original IUCN categories. For information on the 1994 IUCN categories, click here.
Extinct (Ex)
Taxa that are no longer known to exist in the wild after repeated searches of the type localities and other known or likely places.
Extinct/Endangered (Ex/E)
Taxa possibly considered to be extinct in the wild.
Endangered (E)
Taxa in danger of extinction and whose survival is unlikely if the causal factors continue operating. Included are taxa whose numbers have been reduced to a critical level or whose habitats have been so drastically reduced that they are deemed to be in immediate danger of extinction.
Vulnerable (V)
Taxa believed likely to move into the Endangered category in the near future if the causal factors continue operating. Included are taxa of which most or all the populations are decreasing because of over-exploitation, extensive destruction of habitat or other environmental disturbance; taxa with populations that have been seriously depleted and whose ultimate security is not yet assured; and taxa with populations that are still abundant but are under threat from serious adverse factors throughout their range.
Rare (R)
Taxa with small world populations that are not at present Endangered or Vulnerable but are at risk. These taxa are usually localised within restricted geographic areas or habitats or are thinly scattered over a more extensive range.
Indeterminate (I)
Taxa known to be Extinct, Endangered, Vulnerable, or Rare but where there is not enough information to say which of the four categories is appropriate.
Citation: Walter, K.S. and Gillett, H.J. [eds] (1998). 1997 IUCN Red List of Threatened Plants. Compiled by the World Conservation Monitoring Centre. IUCN - The World Conservation Union, Gland, Switzerland and Cambridge, UK. lxiv + 862pp.
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further information contact: Information Office, WCMC, 219 Huntingdon Road, Cambridge CB3 0DL, UK Information enquiries Tel: +44 (0)1223 277722 Main switchboard Tel: +44 (0)1223 277314 Fax: +44 (0)1223 277136 Email: info@wcmc.org.uk Document URL: http:// www.wcmc.org.uk /species/plants/categories.html Revision date: 4-February-2000 | Current date: 4-July-2000 |
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