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The Chestnut oak (Quercus prinus, or Quercus montana in some references) is one of the chestnut oak subgroup of the white oak group, genus Quercus section Quercus. It is one of the most important ridgetop trees in the eastern United StatesThe United States of America also referred to as the United States U. America ¹ or the States is a federal republic in central North America, stretching from the Atlantic in the east to the Pacific Ocean in the west. It shares land borders with Canada in. As a consequence of its dry habitat and ridgetop exposure, it is not usually a large tree, typically 20-30m tall; occasional specimens growing in better conditions can however become large, with trees up to 40-43m tall known. The trees are usually not the best lumber trees because they are usually branched low and not very straight, but when they grow in better conditions, they are valuable for lumber. The timber is marketed as mixed white oak.

The Chestnut oak has the most massively-ridged bark of any eastern North AmericaNorth America is the third largest continent in area and the fourth ranked in population. It is bounded on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the south by the Caribbean Sea, and on the west by the North Pacific Ocean oak, and is readily identified by its dark gray bark. The leaves are virtually identical to those of the Chinkapin oakThe Chinkapin oak Quercus muehlenbergii is a broadleaved tree. Its leaves are coarse and dark, it produces acorns 1/2 to 1 inch in length, and the trunk has thin, flaky bark. The tree grows to 60 feet in height, with a rounded crown. See also Chestnut oak, but the trees can readily be distinguished by the bark, because that of the Chinkapin oak is a light ash-gray and somewhat peeling like that of the White oakWhite oak Scientific classification Domain: Eukaryota Kingdom: Plantae Subkingdom: Tracheobionta Division: Magnoliophyta Class: Rosopsida Order: Fagales Family: Fagaceae Genus Quercus Species alba Binomial name Quercus alba The White oak Quercus alba is o. The chestnut oak is easily distinguished from the Swamp white oakSwamp white oak Scientific classification : Eukaryota : Plantae : Magnoliophyta : Magnoliopsida : Fagales : Fagaceae Quercus bicolor Binomial name Quercus bicolor The Swamp white oak Quercus bicolor is one of the more important white oaks for lumber produ because that tree has whitened undersides on the leaves. However, it is difficult to distinguish from the Swamp chestnut oakSwamp chestnut oak Scientific classification Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Fagales Family: Fagaceae Genus Quercus Subgenus ''Quercus Species michauxi Binomial name Quercus michauxi Nutt. The Swamp chestnut oak Quercu, and many botanists have considered them to be the same species. The chief way to distinguish the two is by habitat: if it grows on a ridge, it is Chestnut oak, and if it grows in wet bottomlands, it is probably the more massive Swamp chestnut oak.

The acorns of the Chestnut oak are some of the largest of native American oaks, surpassed in size only by the Bur oakBur oak Scientific classification Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Fagales Family: Fagaceae Genus Quercus Species macrocarpa Binomial name Quercus macrocarpa Michaux The Bur oak Quercus macrocarpa , native to the midwes and possibly Swamp chestnut oak, and are a valuable wildlife food.

Although the epithet Quercus prinus was given by Linnaeus, the original specimen included a mixture of leaves from this and another species, so some botanists have used the substitute name Quercus montana.