Hagoromo - Hagoromo

Japanese: ハゴロモモ - はごろもも

A plant of the Nymphaeaceae family native to North America that grows underwater and has been naturalized in Japan (illustration). The stems are long and slender, and many adventitious roots grow from the nodes. There are two types of leaves, with the submerged leaves arranged opposite each other and the leaf blade having 5-7 lobes, each of which is further divided into thread-like lobes. Another name for this plant is Fusajunsai, which, together with its name Hagoromomo, comes from the shape of the leaves. The floating leaves are shield-shaped, the leaf blade is oblong and smaller than the submerged leaves, and a flower stalk grows from the leaf axil. The flowers grow singly on the stalk and are 1.5-2 cm in diameter. There are three white sepals and petals.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

北アメリカ原産の水中に生育するスイレン科の植物で，日本にも帰化している（イラスト）。茎は細長く，節から多くの不定根を出す。葉は2型あり，水中葉は対生，葉身は5～7裂し，各裂片はさらに細裂して糸状になる。別名をフサジュンサイといい，ハゴロモモの名とともに，この葉の形状に由来する。浮葉は楯状，葉身は長楕円形で水中葉に比べ小さく，葉腋（ようえき）から花柄を出す。花は花柄上に単生し，径1.5～2cm。萼片，花弁ともに白色で3枚。

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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