just a comment to the categories. I am trying to place the plant articles into the categories which are current in the 2006 IUCN redlist. That means e.g. a plant which is listed as vulnerable in the 2006 IUCN redlist will be placed in the Vulnerable category. In addition we have the IUCN redlist of threatened plants from 1997. This redlist has evaluated much more plants than the current 2006 IUCN redlist of threatened Species. That brings me to the main problem. Many plants which are listed in the Redlist of threatened plants from 1997 (equal in which category) were not evaluated for the current IUCN redlist. In that case i have thought to place this plants in the category: Not listed in the IUCN redlist.
Another note: A plant which is listed in a special category (e.g VU, CR, EN etc.) in a national redlist (e.g. South Africa, Spain) but is not listed in the IUCN redlist will be placed in the Not listed in the IUCN redlist-category.