- Key to Leaves of Virginia Trees
Interactive photographic key to identifying Virginia trees.
- Basics of Tree Identification
Provides information on identifying trees by leaf, bark, fruit, twig, and form.
- What Tree is That?
Resources from the National Arbor Day Foundation for identifying trees and leaves in the Eastern, Central, and Western United States.
- American Chestnut Foundation, The
Contains information on chapters, history, identification, and more. Dedicated to restoration and preservation.
- eNature.com: Trees
Photographic nature field guides for identifying trees, sorted by leaf type: needle-leaf conifers, scale-leaf conifers, untoothed simple leaves, toothed simple leaves, lobed simple leaves, compound leaves, and palms.
- What Tree Is It?
You see an unknown tree. Or perhaps you've found part of a tree, and you want to know what kind of tree it came from. The focus is on common trees of Ohio.
- Dendrology at Virginia Tech: ID It
Interactive keys for identifying trees by leaf and twig.
- Foliage Vermont: Identifying the Leaves of Vermont Foliage
Information on recognizing common Vermont trees during the fall foliage season.
- Identification of Common Trees of Iowa: An Interactive Key
Interactive key to aid in identifying the most common trees in Iowa. Includes information on leaves, fruits, and bark.
- Tree Anatomy and Identification - About.com
Article and collection of online resources for identifying trees. Includes an online interview to identify the leaves of fifty common native North American trees.
- Leaf Identification
Instructional unit from the Department of Horticulture at Penn State University. Includes information on identifying leaves by structure, shape, groupings, margins, and arrangement.
- Auburn University: Leaf Identification Resource
Browse through to identify plants by leaf type.