Identification of Chestnut (Castanea) Species
- Key for identifying American and Eurasian species and hybrids.
- http://ridgwaydb.mobot.org/resbot/Ches/chkey.htm

Chestnut Species Identification
- Includes images of American, Chinese, European, and Japanese chestnuts and Allegheny Chinkapin.
- http://www.mindspring.com/~psisco/www/overview.html