Emplectopteris

Japanese: Emplectopteris
Emplectopteris

…Since most ferns and seed ferns have pinnately compound leaves, Gigantopteris, which has a simple leaf, was unusual and drew attention. This simple leaf has seeds on the leaf, and is considered to be a seed fern because its evolutionary history from Emplectopteris , which has a tripinnately compound leaf, is well understood. The evolutionary history of this plant has shown that simple leaves are derived from pinnately compound leaves. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…シダ類やシダ種子類はほとんどが羽状複葉だったので,単葉を示すギガントプテリスは珍しく注目されていた。この単葉は葉に種子をつけていて,3回羽状複葉のエンプレクトプテリスEmplectopterisに由来した進化の過程がよく判明しているのでシダ種子類と考えられている。この植物の進化過程によって単葉は羽状複葉から由来することがわかった。…

※「Emplectopteris」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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