Psilotopsida

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Psilotopsida

Description Psilotopsida, commonly known as whisk ferns, is a class of primitive vascular plants that lack true leaves and roots. They belong to the division Psilophyta, which is an ancient group of plants that was dominant during the Devonian period. The Psilotopsida class has only two extant families, Psilotaceae and Ophioglossaceae, with a total of about 92 species. Taxonomic Information…