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Planera aquatica : ウィキペディア英語版 | Planera aquatica
''Planera aquatica'', the planertree or water elm, is a single species in the southeastern United States, a small deciduous tree 10–15 m tall, closely related to the elms but with a softly, prickly nut 10–15 mm diameter, instead of a winged seed. It is the sole species in the genus ''Planera''. It grows, as the name suggests, on wet sites. The leaves are 3–7 cm long, with a serrated margin. Despite its common English name, this species is not a true elm, although it is a close relative of the elms (species of the genus Ulmus). It is also subject to Dutch Elm Disease, a disease which affects only members of the Ulmaceae. It is native to most of the southeast United States. It is hardy down to Zone 7.〔(【引用サイトリンク】title=Water Elm Ulmaceae ''Planera aquatica'' J.F. Gmel. )〕 == References ==
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「Planera aquatica」の詳細全文を読む
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