Fern

Japanese: fern
Fern

Ferns are a group of polyphyletic vascular plants that remain at the spore stage and are not considered to be a systematic group. Ferns are generally classified as true ferns, but other ferns include the psilots, lycopods, and horsetails (collectively known as fernallies).
[Life cycle]
All non-seeding vascular plants have an independent life cycle consisting of a sporophyte (the body of a common fern) and a gametophyte (the prothallus), which alternate in a regular pattern.

*Some of the terminology that mentions "fern" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…多系の維管束植物のうち,胞子植物段階にとどまっている群で,系統的なまとまりではないと考えられている。一般にシダ類といわれるものは真正シダ類fernで,シダ植物にはほかにマツバラン類psilotum,石松(せきしよう)類lycopod,トクサ類(有節類)horsetail(これらをひっくるめてfernalliesという)が含まれる。
[生活環]
 種子をつくらない維管束植物はすべて,生活史のうちに,独立の生活を営む胞子体の世代(ふつうにみられるシダの体)と配偶体の世代(前葉体)をもち,それらが交互に現れる規則正しい世代交代を行っている。…

※「fern」について言及している用語解説の一部を掲載しています。

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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