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davidia involucrata
''Davidia involucrata'' (dove tree, handkerchief tree, pocket handkerchief tree, ghost tree) is a medium-sized deciduous tree, usually placed in the tupelo family (Nyssaceae),〔(【引用サイトリンク】 Angiosperm Phylogeny Website - Cornales )〕〔(【引用サイトリンク】 GRIN Taxonomy for Plants - ''Davidia involucrata'' )〕 but sometimes included (with the tupelos) in the dogwood family (Cornaceae), and by yet others given family status of its own, as Davidiaceae. It is native to South Central and Southwest China from Hubei to southern Gansu, south to Guizhou, Sichuan and Yunnan.
==Taxonomy==
''D. involucrata'' is the only member of its genus, but there are two varieties differing slightly in their leaves, ''D. involucrata'' var. ''involucrata'', which has the leaves thinly pubescent (short-haired) on the underside, and ''D. involucrata'' var. ''vilmoriniana'', with glabrous (hairless) leaves. Some botanists treat them as distinct species, with good reason, as the two taxa have differing chromosome numbers so are unable to produce fertile hybrid offspring.
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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