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''Quercus × warei'' is a hybrid oak tree in the genus Quercus. The tree is a hybrid of ''Quercus robur'' L. f. ''fastigiata'' (Lam.) O. Schwarz (Upright English oak) and ''Quercus bicolor'' Willd. (swamp white oak). The hybrid is named for the American dendrologist George Ware, former Research Director at the Morton Arboretum, Illinois. ==Cultivars== Two cultivars, 'Long' and 'Nadler' were patented in 2007. The mother tree of both cultivars is a ''Quercus robur'' f. ''fastigiata''〔 (Upright English Oak, a narrow form) growing in Jacksonville, Illinois.〔 Approximately 1000 seeds were collected from the mother plant in 1974 and propagated, with two selected for further development as cultivars, which are now propagated clonally.〔 The 'Long' cultivar is marketed under the trade designation , and the 'Nadler' cultivar under the trade designation . 'Nadler' oaks are 11 m (35 ft) tall with a limb spread of 2 m (6 ft) at an age of 30 years.〔 'Nadler' is highly resistant to powdery mildew,〔 which plagues the ''Q. robur'' parent. This clone also exhibits heterosis (hybrid vigor).〔 File:Kindred Spirit hybrid oak leaves.jpg|Leaves of a 'Nadler' cultivar File:Kindred Spirit hybrid oak unmature acorns.jpg|Immature acorns of a 'Nadler' cultivar File:Acorns of Kindred Spirit Hybrid Oak.jpg|Acorns of a 'Nadler' cultivar File:Kindred Spirit hybrid oak without leaves.jpg|'Nadler' cultivar without leaves 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 × warei」の詳細全文を読む スポンサード リンク
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