Arbor, EAN - Arbor

Japanese: アーバー,E.A.N. - あーばー
Arbor, EAN - Arbor

...The projections were once thought to have evolved into leaves, but since they had neither stomata nor vascular bundles, they are now thought to have been glands. EAN Arber (1921) classified the Early Devonian plants, centered around Psilophyton , as the Psilophyton flora, and the Late Devonian plants as the Archaeopteris flora, and considered the former to be the early land plants. Today, the Rhyniales, which have no main stem and only bare branches with bifurcated branches, are considered to be older than Psilophyton, which had a main stem, and are therefore considered to be the early land plants, and the name Psilophyton flora is no longer used. ...

*Some of the terminology explanations that mention "Arbor, EAN" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…突起物は葉に進化するものと考えられたこともあったが,気孔もなく,維管束もないことから,現在では腺と考えられている。アーバーE.A.N.Arber(1921)はプシロフィトンを中心としたデボン紀前期の植物をプシロフィトン植物群Psilophyton flora,デボン紀後期の植物をアルカエオプテリス植物群Archaeopteris floraとし,前者を陸上植物初期のものと考えた。現在では主茎をもったプシロフィトンより古く,主茎がなく二叉(にさ)分枝する裸枝のみのライニア目が初期陸上植物と考えられ,プシロフィトン植物群の名は使用されなくなった。…

※「アーバー,E.A.N.」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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