American Horticultural Society
Botanical Society of America
Center for Plant Conservation
Flora of North America on-line
Invasivespecies.gov Invasivespecies.gov is the gateway to Federal efforts concerning invasive species. On this site you can learn about the impacts of invasive species and the Federal government's response, as well as read select species profiles and find links to agencies and organizations dealing with invasive species issues. Invasivespecies.gov is also the website for the National Invasive Species Council, which coordinates Federal responses to the problem.
League of Conservation Voters A nonpartisan political voice for over nine million members of environmental and conservation groups, LCV is the only national environmental organization dedicated full-time to educating citizens about the environmental voting records of Members of Congress.
Missouri Botanical Garden
Nature Serve a source for conservation information on more than 50,000 plants, animals, and ecological communities of the United States and Canada. NatureServe provides in-depth information on rare and endangered species, but includes common plants and animals too.
North American Mycological Association
Our Living Resources
Plant Conservation Alliance Bureau of Land Management
Smoky Mountain Annual Wildflower Pilgrimage
Stein's Virtual herbarium
U. S. National Arboretum
USDA Plants Database
Vascular Plant Types Database - New York Botanical Garden
Synonymized Checklist of the Vascular Flora of the U.S., Puerto Rico & Virgin Islands
Conservation of Biological Diversity in the Great Lakes Ecosystem
Index Herbariorum - detailed directory of 3000+ public herbaria of the world and the 8800+ staff members associated with them
International Code of Botanical Nomenclature
International Plant Names Index (IPNI)- a database of the names and associated basic bibliographical details of all seed plants. Its goal is to eliminate the need for repeated reference to primary sources for basic bibliographic information about plant names.
Checklist of Online Vegetation and Plant Distribution Maps
Note: Some of the links from this or related pages may lead to Web sites of a commercial nature. We mention these sites solely as good sources of information on some aspect of botany, and have no intent to endorse or promote their products or services.