Landscape Plants Images, Identification, and Information Oregon State University
Over 1,700 woody landscape plants, includes a Woody Plant Identification System, searchable by characteristics such as leaf margin, fruit shape, and flower color. Great for landscape design ideas as well as identifying existing plants.
Key to Leaves of Virginia Trees Virginia Tech dendrology
Jeff Kirwan's native tree ID online ‐ great to use with kids with wi‐fi outdoors. Get a leaf and key it via leaf shape and arrangement.
Bug Guide hosted by Iowa State University Entomology
A knowledgebase of bugs from the United States and Canada, for identification and research. Has a "Clickable Guide" of drawings of different insect shapes, which lead to insect order pages with many photos of specimens of the different families. Has a handy page on household pests and dangerous pests. You can also submit photos for identification.
Invasive and Exotic Species of North America invasive.org
Plants, insects, pathogens and other species that are not native to the ecosystem and cause economic , health or environmental harm.
See also Invasive Plants in the Mid‐Atlantic at
Weed Identification Guide Virginia & Southeastern USA
Virginia Tech Plant Pathology and Weed Science provides this site, with many weeds arranged by common name, includes a grass ID section with keys.