Common bladder senna (English spelling)

Japanese: ボウコウマメ(膀胱豆) - ボウコウマメ（英語表記）common bladder senna

A deciduous tree of the legume family that bears swollen, pouch-shaped fruits native to the western Mediterranean region and Asia Minor. It reaches a height of 4 m. The leaves are pinnately compound, alternate, and 6-15 cm long. There are 7-11 odd-numbered leaflets, obovate, usually 3 cm long and 1.5 cm wide, and the upper surface of the leaves is hairless. A spike of 3-6 flowers blooms in June-August. The inflorescence is 4-5 cm long. The flowers are yellow, about 2 cm long, and the standard petals have prominent reddish-brown veins. The fruit is about 5 cm long and 2-3 cm wide, has a membranous, hairless skin, turns yellowish-brown when ripe, and contains a dozen or so small seeds.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

膨らんだ袋状の果実をつけるマメ科の落葉樹で，地中海地方西部と小アジア地方に自生する。高さ4mに達する。葉は羽状複葉で，互生し，長さ6～15cm。小葉は奇数個で7～11枚，倒卵形，ふつう長さ3cm，幅1.5cmくらい，葉の表は無毛。6～8月に3～6花が穂に集まって咲く。花序は長さ4～5cm。花は黄色で，長さ約2cm，旗弁には赤褐色の脈が目だつ。果実は長さ約5cm，幅2～3cm，果皮は膜質で無毛，熟すと黄褐色となり，中に小型の種子が10数個ある。

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

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