Hibimidoroh - Hibimidoroh

Japanese: ヒビミドロ - ひびみどろ

A green, short, hair-like seaweed that often grows on rocks and piles along the coasts of Japan, especially in winter near the high tide line of inland bays. It belongs to the Chlorophyceae family, Euonymus nigricans. The body consists of a single row of cell filaments, 10-25 μm thick, each containing one nucleus and one ring-shaped chloroplast. In winter, when the seawater temperature is low, the plant mainly reproduces asexually by producing zoospores, but in spring, when the temperature rises, it produces male and female gametes and reproduces sexually. The zygote remains single-celled over the summer, and in autumn zoospores are formed inside it.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

日本各地の沿岸，とくに冬季に内湾の高潮線付近の岩上や杭などによく生育する，緑色の短い毛髪状の海藻。緑藻綱ヒビミドロ科に所属する。体は1列の細胞糸からなり，太さ10～25μm，細胞内には1個の核と1個の環帯状の葉緑体がある。海水温度が低い冬季は，主として無性的に遊走子をつくって生殖するが，温度が上昇する春季になると，雌雄の配偶子をつくって有性生殖を行う。接合子は単細胞のままで夏を越し，秋に内部に遊走子を形成する。

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