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|Noun||1.||family Psilophytaceae - Paleozoic plants|
fern family - families of ferns and fern allies
order Psilophytales, Psilophytales - Paleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants
genus Psilophyton - type genus of the Psilophytaceae: genus of small wiry herbaceous Paleozoic plants with underground rhizomes and apical sporangia
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