This Web site from the Smithsonian Institution's Department of Systematic Biology offers online access to taxonomic and geographical information on the vascular plants of the Marquesas Islands. An easy-to-use search tool retrieves plant checklists, which include species distribution and status information. Other features of this well-presented Web site include a searchable image gallery,...

Provided by the Noble Foundation, a charitable foundation located in Ardmore, Oklahoma that focuses on agriculture and plant biology, this site contains images of over 600 vascular plants native primarily to the Oklahoma-Texas region. Offered as an educational tool for botanists, natural resource managers, and students, the site divides the images into three main categories: Grasses & grasslike...

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...