Bur‐cucumber

Japanese: アレチウリ（英語表記）bur‐cucumber

A naturalized plant of the Cucurbitaceae family that grows on roadsides and wastelands (illustration). It is an annual vine with stems that grow to several meters and use tendrils to climb up onto other plants. The leaves are alternate and long-stalked, shallowly lobed into 3-7 parts, 8-13 cm long and 13 cm wide, and have rough surfaces with small white projections. It is monoecious, and produces stalked inflorescences from the base of the leaves from summer to autumn. The male flowers are yellowish-white and cone-shaped, about 1 cm in diameter. The stamens are fused together, and the long, twisted anthers are clustered in a globular shape at the end of the style that protrudes from the center of the flower.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

道端や荒れ地に生えるウリ科の帰化植物（イラスト）。一年生のつる植物で，茎は数mに伸び，巻ひげで他物によじのぼる。葉は長い柄があって互生し，浅く3～7裂して長さ幅ともに8～13cm，表面には白い小突起があってざらつく。雌雄同株で，夏から秋にかけて葉のつけ根から柄のある花序を出し，雄花は円錐状の花序を作り，黄白色で径約1cm。おしべは合生して花の中央につき出た柱の先に，長く曲がりくねった葯が球状に集まっている。

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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