Humulus scandens (Lour.) Merr.

Japanese: カナムグラ(葎草) - カナムグラ（英語表記）Humulus scandens (Lour.) Merr.

An annual vine of the Cannabaceae family that grows in wastelands such as roadsides and riverbanks (illustration). It is widely distributed from the warm temperate zone to the subtropics of East Asia. The vine-like stems can reach several meters in length. The stems and petioles have small, inverted thorns that help them cling to other plants. The leaves are palmately divided into 5 to 7 lobes, 5 to 15 cm long, and have rough hairs on both sides. The plant is dioecious, with differentiated sex chromosomes. It flowers from August to September. The female flowers are enclosed in large bracts and are pine cone-shaped. The male flowers are in a panicle with five tepals. The fruit is lenticular, about 5 mm in diameter, has markings similar to those on a quail's egg, is yellowish brown, and has fine hairs on the upper part.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

路傍や河原などの荒地に繁茂するアサ科の一年生のつる草（イラスト）。東アジアの暖帯から亜熱帯に広く分布する。つる性の茎は数mに及ぶ。茎と葉柄には逆向きの小さなとげがあり，他の植物にまつわりつくのに役立っている。葉は掌状に5～7裂し，長さ5～15cm，両面にざらざらした毛がある。雌雄異株で，性染色体が分化している。花期は8～9月。雌花は大きな苞につつまれ，松かさ状。雄花は円錐花序につき，花被片5枚。果実はレンズ形で直径約5mm，ウズラの卵の模様に似た斑紋があり，黄褐色で上方に微毛がある。

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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