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Quercus bicolor
''Quercus bicolor'', the swamp white oak, is a North American species of medium-sized trees in the beech family. It is a common element of America's north central and northeastern mixed forests. It can survive in a variety of habitats. It forms hybrids with bur oak where they occur together in the wild.
==Description==
''Quercus bicolor'' grows rapidly and can reach tall with the tallest known reaching 〔Muhlenberg, Ges. Naturf. Freunde Berlin Neue Schriften. 3: 396. 1801.〕 and lives up to 350 years.
The bark resembles that of the white oak. The leaves are broad ovoid, long and 7-11 (3–4 in) cm broad, always more or less glaucous on the underside, and are shallowly lobed with five to seven lobes on each side, intermediate between the chestnut oak and the white oak. In autumn, they turn brown, yellow-brown, or sometimes reddish, but generally, the color is not as reliable or as brilliant as the white oak can be. The fruit is a peduncled acorn, 1.5–2 cm (rarely 2.5 cm) (.6-.8 in, rarely 1 in) long and broad, maturing about 6 months after pollination.〔(Flora of North America: ''Quercus bicolor'' )〕
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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