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quercus prinus
''Quercus prinus'' (syn. ''Quercus montana''), the chestnut oak, is a species of oak in the white oak group, ''Quercus'' sect. ''Quercus''. It is native to the eastern United States, where it is one of the most important ridgetop trees from southern Maine southwest to central Mississippi, with an outlying northwestern population in southern Michigan. It is also sometimes called "rock oak" because of montane and other rocky habitats. As a consequence of its dry habitat and ridgetop exposure, it is not usually a large tree, typically tall; occasional specimens growing in better conditions can however become large, with trees up to tall known. They tend to have a similar spread of . A 10-year-old sapling will stand about tall. This species is often an important canopy species in an oak-heath forest.〔(''The Natural Communities of Virginia Classification of Ecological Community Groups'' (Version 2.3), Virginia Department of Conservation and Recreation, 2010 )〕〔Schafale, M. P. and A. S. Weakley. 1990. ''Classification of the natural communities of North Carolina: third approximation''. North Carolina Natural Heritage Program, North Carolina Division of Parks and Recreation.〕
==Taxonomy and nomenclature==
Extensive confusion between the chestnut oak (''Quercus prinus'') and the swamp chestnut oak (''Quercus michauxii'') has occurred, and some botanists have considered them to be the same species in the past.
The name ''Quercus prinus'' was long used by many botanists and foresters for either the chestnut oak or the swamp chestnut oak, with the former otherwise called ''Q. montana'' or the latter otherwise called ''Q. michauxii''. The application of the name ''Q. prinus'' to the chestnut oak is now often accepted,〔ITIS (the Integrated Taxonomic Information System) accepts ''Q. prinus'' as the accepted name for the chestnut oak.〕〔The confusion arose from differing identifications of the type specimens for the Linnaean name, by some (but not all) botanists considered resolved by close examination of the leaf pubescence, which differs in the two species.〕 although sometimes that name is declared to be of uncertain position, unassignable to either species, with the chestnut oak then called ''Q. montana'', as in the ''Flora of North America''.〔(【引用サイトリンク】url=http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233501064 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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