|
''Quercus virginiana'', also known as the southern live oak, is a normally evergreen oak tree native to the southeastern United States. Though many other species are loosely called live oak, the southern live oak is particularly iconic of the Old South. ==Taxonomy== A large number of common names are used for this tree, including "Virginia live oak", "bay live oak", "scrub live oak", "plateau oak", "plateau live oak", "escarpment live oak", and (in Spanish) "''encino''". It is also often just called "live oak" within its native area, but the full name "southern live oak" helps to distinguish it from other live oaks, a general term for any evergreen species of oak.〔 (【引用サイトリンク】title=Quercus virginiana in Flora of North America @ efloras.org )〕 This profusion of common names partly reflects an ongoing controversy about the classification of various live oaks, in particular its near relatives among the white oaks (''Quercus'' subgenus ''Quercus'', section ''Quercus''). Some authors recognize as distinct species the forms others consider to be varieties of ''Quercus virginiana''. Notably, the following two taxa, treated as species in the ''Flora of North America'', are treated as varieties of southern live oak by the United States Forest Service: the Texas live oak, ''Quercus fusiformis'' (''Q. virginiana'' var. ''fusiformis'') and the sand live oak, ''Quercus geminata'' (''Q. virginiana'' var. ''geminata''). Matters are further complicated by southern live oaks hybridizing with both the above two species, and also with dwarf live oak (''Q. minima''), swamp white oak (''Q. bicolor''), Durand oak (''Q. durandii''), overcup oak (''Q. lyrata''), bur oak (''Q. macrocarpa''), and post oak (''Q. stellata''). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Quercus virginiana」の詳細全文を読む スポンサード リンク
|