The Information Center of the Environment and the US National Park Service (NPS) have developed a "preliminary" data base of vascular plants and vertebrates located on National Park Service Lands. Although the database is not a complete list of species residing on NPS lands, it contains relatively complete lists for both small and large parks. Users can search for plants and animals by species...

The United States Department of Agriculture's Natural Resources Conservation Service has created this remarkable database to provide standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the United States and its territories. As there is a wealth of information here, first-time visitors may wish to start with the I Want to… area. Here they can make...

The staff of the Wisconsin State Herbarium have created this excellent online resource for exploring the world of vascular plants in Wisconsin, complete with several helpful finding aids to navigate the collection. Based on decades of research (including the ground breaking work of John Curtis), visitors can search for plants by name, habitat, status, and county. Also, visitors to the site can...