Black Walnut Toxicity
- Information from the West Virginia University Extension Service on this tree and its relationship to other plants growing nearby, many of which are affected by the toxic chemical juglane produced by it.
- http://www.wvu.edu/~agexten/hortcult/fruits/blkwalnt.htm

Juglans nigra (Black Walnut)
- Images and description of this species.
- http://www.forestry.auburn.edu/samuelson/dendrology/juglandaceae_pg/black_walnut.htm

Juglans nigra (Black Walnut)
- Photos of entire tree, bark, twig, leaf, flower, and fruit.
- http://www.cas.vanderbilt.edu/perl/bioview.pl?genspec=juni&action=View

Juglans nigra
- Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/tree/jugnig/