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Sweet Chestnut (Castanea species). Forest Chestnuts. The American chestnut (Castanea dentata) was one of the largest growing forest trees in eastern North America. It was important for timber as well as nuts for human use as well as wildlife.A deadly fungus disease, introduced from the Orient effectively wiped out this chestnut in the first half of the 20th century.he American chestnut (Castanea dentata) was one of the largest growing forest trees in eastern North America. It was important for timber as well as nuts for human use as well as wildlife. A deadly fungus disease, introduced from the Orient effectively wiped out this chestnut in the first half of the 20th century.
Save. There are four different varieties of edible chestnuts: American, European, Chinese and Japanese. The chestnut tree is related to the beech and the oak tree. Chestnuts used to be the main starch staple in Europe until the potato was introduced. Do not confuse edible chestnuts with horse chestnuts or buckeyes, which are both inedible. 2  A Chinese chestnut tree is not the same thing as a water chestnut. 3  A water chestnut is a native Asian aquatic plant with corms on the roots that are harvested and used in many Asian dishes.