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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.
1 European species sweet chestnut (Castanea sativa) (also called Spanish chestnut in the US) is the only European species of chestnut, though was successfully introduced to the Himalayas and other temperate parts of Asia. 2  Unrelated, but externally similar species of horse chestnut are abundant around Europe.hestnut trees are of moderate growth rate (for the Chinese chestnut tree) to fast-growing for American and European species. Their mature heights vary from the smallest species of chinkapins, often shrubby, to the giant of past American forests, C. dentata that could reach 60 m.