Fraxinus

...A deciduous tree of the Oleaceae family. In the Hokuriku region, it is planted on the ridges of rice fields as rice-raising supports, and is also called tamonoki (illustration). It can reach a height of 15m and a diameter of 60cm, with light brownish-gray bark on the trunk. The current-year branches are thick and have a square, angular cross-section. The leaves are odd-pinnate compound, opposite each other, with 5-9 leaflets, long ovate, and 5-15cm long. In April and May, panicles are produced at the ends of the current-year branches. It is dioecious, with no corolla, but female flowers have a pistil and sometimes two stamens, and male flowers have two stamens. In autumn, it produces oblanceolate samaras 3-4cm long. ...

*Some of the terminology explanations that mention "Fraxinus" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…モクセイ科の落葉高木で，北陸地方では田のあぜに稲架木（はざぎ）として植えられ，タモノキともいう（イラスト）。高さ15m，直径60cmに達し，幹の樹皮は淡褐灰色を呈する。当年枝は太く，断面が四角く角張る。葉は対生し，奇数羽状複葉で，小葉は5～9個，長卵形で長さ5～15cm。4～5月，当年枝端に円錐花序をつける。雌雄異株で花に花冠はなく，雌花にはめしべとときに2本のおしべ，雄花には2本のおしべがある。秋に長さ3～4cmの倒披針形の翼果ができる。…

※「Fraxinus」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報