Chestnuts are a delicious low-fat food, the grain that grows on a tree. Once upon a time, nearly one in four of the trees throughout the Appalachain area, from Maine to Georgia, was an American chestnut (
Castanea dentata). These trees provided bountiful crops of nuts every year, supporting people and livestock as well as wildlife. Then in a few decades in the 20th century, nearly all of these trees died as a result of a fungal blight brought into the country by a related chestnut species from China.
I just saw a surviving American chestnut tree in Pennsylvania a few weeks ago. I was almost as excited as if I'd seen a passenger pigeon. I put the tree's owners in touch with the American Chestnut Foundation.
http://www.acf.org
If you know of any surviving trees, contact the American Chestnut Foundation.
C dentata grows back from the roots after the main trunk dies from the blight, so it now survives as a shrub that tends to die back before it is big enough to bear nuts. Also, the ACF will soon be making blight-resistant trees available to the general public. If you live in an area that is not affected by the blight (such as Michigan or Wisconsin), you can even get wild-type chestnuts for planting.