A binational collaboration of over 800 botanists and 30 institutions in the US and Canada, the FNA project is producing "a comprehensive set of taxonomic treatments for all North American plant species and infraspecific taxa" to be published online and in 30 printed volumes by Oxford University Press. FNA treatments include "accepted names, synonyms, bibliographic references, keys for...

Produced by the University of Minnesota Libraries, Plant Information Online is intended for just about anyone with a green thumb, or those who want to get their thumbs a bit greener. Visitors to this fine database will find details on over 134,000 wild and cultivated plants, along with information on over 2200 North American retail and wholesale seed and nursery firms. From the homepage, visitors...

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...