Akagashi - Akagashi

Japanese: アカガシ - あかがし
Akagashi - Akagashi

An evergreen tall tree of the Fagaceae family (APG classification: Fagaceae). It can reach a height of 20 meters, with gray-black bark that is smooth on young trees but bald and scaly on older trees. The leaves are alternate, elliptical, and tail-like at the tip, and are the largest of all oaks at 7 to 20 centimeters long, giving it the nickname of Ooak. The leaves are entire, dark green on the upper side and bright green on the lower side. The nuts mature in October of the following year. The cupule has six to seven layers of horizontal rings. It is common in the warm to lower temperate zones of Honshu, Shikoku, and Kyushu, and is the most cold-resistant of all oaks. It is also found on the Korean Peninsula and China. The name Akagashi comes from the color of the wood (reddish brown), and it is used for utensils and other things because it is hard and strong.

[Shinsuke Hagiwara January 21, 2020]

Oak flower (morphology)
©Shogakukan ">

Oak flower (morphology)


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

ブナ科(APG分類:ブナ科)の常緑高木。高さ20メートルに達し、樹皮は灰黒色で、若木では平滑だが、老木では鱗片(りんぺん)状にはげる。葉は互生し、楕円(だえん)形で先端が尾状に伸び、長さ7~20センチメートルとカシ類中もっとも大きく、オオガシの別名がある。葉は全縁、表面は濃緑色、裏面は鮮緑色。堅果は翌年の10月に成熟する。殻斗(かくと)は6~7層の横輪がある。本州、四国、九州の暖帯から温帯下部に多く、カシ類ではもっとも耐寒性が強い。朝鮮半島、中国にも分布する。アカガシの名は材の色(赤褐色)に由来し、堅く強いため器具その他に用いる。

[萩原信介 2020年1月21日]

アカガシの花〔形態〕
©Shogakukan">

アカガシの花〔形態〕


出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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