A deciduous tall tree of the elm family. It grows naturally in the mountains and fields of Honshu, Shikoku, and Kyushu, but because it grows large and spreads its branches widely to provide shade, it was planted at mileposts during the Edo period. Its gray, upright trunk can reach a height of 20 m and a diameter of 1 m. Its leaves are alternate, asymmetrically distorted egg-shaped or elliptical, pointed at the tip, and have shallow sawtooth edges on the upper half of the edge. They are thick and have three prominent veins. Flowers appear on new branches around May, and although there are both female and male flowers, they are not very noticeable. The drupes are small and spherical, ripen to orange in the fall, and are sweet and edible. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
ニレ科の落葉高木。本州,四国,九州などの山野に自生するが,大木になり枝を大きく広げて日陰をつくるので,江戸時代には一里塚に植えられた。幹は灰色で直立し,高さ 20m,直径 1mにも達する。葉は互生し,左右不対称のゆがんだ卵形または楕円形で先がとがり,縁の上半部に浅い鋸歯がある。また葉質は厚く,3本の脈が目立っている。花は5月頃新枝につき,雌花と雄花があるがあまり目立たない。核果は小球形で,秋にオレンジ色に熟し,甘くて食べられる。
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