Neptunia oleracea Lour.

Japanese: ミズオジギソウ(英語表記)Neptunia oleracea Lour.
Neptunia oleracea Lour.
A non-cold-tolerant aquatic perennial plant of the legume family. It is widely distributed in tropical Asia, Africa, and South America. It is also known as Kaijinsou (sea god grass). Its specific name, oleracea , means edible vegetable, and while it is not widely cultivated in Japan, its young shoots are eaten as vegetables in Indochina, India, tropical Africa, and other places. In addition, like Mimosa pudica, it closes its leaves when touched, so it is sometimes used as a teaching material in schools and is also viewed as algae in aquariums. It has thick, spongy stems and pinnate compound leaves, and produces spike-like, deep yellow flowers in summer.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
マメ科の非耐寒性水生多年草。熱帯アジア,アフリカ,南アメリカに広く分布する。別名カイジンソウ(海神草)という。種小名のoleraceaは食用野菜という意味で,日本ではあまり栽培されていないが,インドシナ,インド,熱帯アフリカなどでは若芽を野菜として食用にする。このほかオジギソウと同じく,葉に触れると葉を閉じる開閉運動をするため,学校の教材とされることもあるし,水槽の藻として観賞されることもある。海綿質の太い茎があり,葉は羽状複葉で,夏に穂状花序をなして濃黄色の花を咲かせる。

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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