Psilophyton
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〘Noun〙 (psilophyton) A primitive fern discovered as a fossil in strata from the end of the Silurian period to the Devonian period of the Paleozoic era. It grows to about 20 centimeters in height. It has no leaves or roots, and produces scale-like protrusions on its stem. The sporangia are ellipsoid and are attached to the tip of the stem. [English-Japanese and Japanese-English Geography Dictionary (1914)] Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information |
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〘名〙 (psilophyton) 古生代シルル紀末からデボン紀の地層から化石として発見された原始的シダ植物の一つ。高さ二〇センチメートル内外。葉と根がなく、茎に鱗片状の突起を生じる。胞子嚢は楕円体で茎の先端に着く。〔英和和英地学字彙（1914）〕
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