Tonga climber

Japanese: ハブカズラ（英語表記）Tonga climber

A climbing perennial vine of the Araceae family. It is cultivated in greenhouses for decorative purposes. The stems are creeping and climb onto other plants using attached roots, and also produce aerial roots. The opposite leaves are simple and circular-cordate when young, but those on mature parts become oval, about 50 cm long, and deeply pinnately lobed. From the leaf axils grow flower stalks about 10 cm long and cylindrical spadixes surrounded by green-white bracts. The spadix is also green and cylindrical, about 10 cm long, and densely packed with bisexual flowers with six tepals.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

よじのぼるサトイモ科のつる性多年草。観賞用に温室に栽植される。茎はつる性で，付着根で他物によじのぼり，また気根を出す。対生する葉は若い時期には円心形単葉であるが，老熟した部分につくものは長円形となり，長さ約50cm，羽状に深裂する。葉腋（ようえき）より長さ10cmほどの花茎と，緑白色の仏焰苞（ぶつえんほう）につつまれた円柱形の肉穂花序を出す。肉穂花序も緑色，円柱形で，長さ10cmあまり，6枚の花被片を有する両性花をぎっしりと密集させる。

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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