Hibamata - Hibamata

Japanese: ヒバマタ - ひばまた

A leaf-like brown alga of the Fucalaceae family (illustration) that is widely distributed along the coasts of cold seas such as Hokkaido and the Tohoku region, and that grows in colonies on rocks near the high tide line. The body is flattened and repeatedly forked into a fan shape. It is 15-20 cm tall and 1-2 cm wide, with a clear midrib except at the tip. In summer, it produces oophores and antheridium at the tip of the body, where meiosis occurs to produce haploid eggs and sperm. The zygote that is produced as a result of fertilization germinates and grows into the usual algal body. In other words, the algal body is diplomorphic, with no haploid generation.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

北海道や東北地方などの寒海域の沿岸に広く分布し，高潮線付近の岩上に群生するヒバマタ科の葉状の褐藻（イラスト）。体は扁平で，叉状（さじよう）分枝を繰り返して全体は扇形となる。高さ15～20cm，幅1～2cmとなり，先端部を除いて中肋が明りょうである。夏に体の先端部に生卵器と造精器をつくり，ここで減数分裂が起きて単相の卵と精子ができる。受精の結果できた接合子は，発芽してふつうに見る藻体に生育する。すなわち藻体は複相であり，単相の世代はない。

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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