Sourwood: Oxydendrun arboreum
- Description, habitat, life history, geographic distribution, and uses of this tree of the southeastern United States. Also known as sorrel-tree or lily-of-the-valley-tree.
- http://wildwnc.org/trees/Oxydendrum_arboreum.html

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