Definition of Order Psilophytales
1. Noun. Paleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants.
Generic synonyms: Plant Order
Group relationships: Division Pteridophyta, Pteridophyta
Member holonyms: Psilophyte, Family Psilophytaceae, Psilophytaceae, Family Rhyniaceae, Rhyniaceae
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