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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.
Both tree and water chestnuts are delicious, but they are entirely unrelated and belong to two different plant families. Tree chestnuts (Castanea spp.) belong to the beech tree family (Fagaceae), which are forest trees and shrubs. The chestnuts are shiny brown nuts that develop from catkin-like flowers.