Hosted by the Missouri Botanical Garden, this website presents the Center for Plant Conservation (CPC)-National Collection of Endangered Plants which "contains plant material for more than 600 of the country's most imperiled native plants." The Collection website links to informative profiles for many endangered plants. Plant profile pages include the following concise sections: Distribution and...

The USDA Natural Resource Conservation Service's Northeast National Technical Center in Chester, Pennsylvania produced Northeast Wetland Flora: Field Office Guide to Plant Species. The guide contains black and white illustrations, full species descriptions (with color photographs, illustrations, and small distribution maps), illustrated glossaries, an alphabetical species list (provides common and...

This straightforward guide to the flora of Missouri comes courtesy of Missourian Dan Tenaglia. The site offers photos and descriptions of the flowering and non-flowering plants of the region. Tenaglia's easy-to-use key requires users to identify flower color and leaf characteristics only (for the most part); results are thumbnail photos that lead to summary information and additional images. The...

Created by botanist Dr. Gerald D. Carr of the University of Hawaii, this website is filled with great annotated photos of vascular plants. The site is organized into sections for the non-flowering and flowering plant families. The plant families are organized according to several systems including traditional presentation, Arthur Cronquist’s classification scheme (1981), and the phylogenetic...