Hart's-tongue
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Hart's-tongue
''Asplenium scolopendrium'', commonly known as the hart's-tongue fern, is an evergreen fern in the genus ''Asplenium'' native to the Northern Hemisphere. Description The most striking and unusual feature of the fern is its simple, undivided fronds. The leaves' supposed resemblance to the tongue of a hart (deer), hart (an archaic term for a male red deer) gave rise to the common name "hart's-tongue fern". Taxonomy Carl Linnaeus, Linnaeus first gave the hart's-tongue fern the binomial nomenclature, binomial ''Asplenium scolopendrium'' in his ''Species Plantarum'' of 1753. The Latin binomial nomenclature, specific epithet ''scolopendrium'' is derived from the Greek ''skolopendra'', meaning a centipede or millipede; this is due to the sorus, sori pattern being reminiscent of a Myriapoda, myriapod's legs. A global phylogeny of ''Asplenium'' published in 2020 divided the genus into eleven clades, which were given informal names pending further taxonomic study. ''A. scolopendrium'' bel ...
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Asplenium
''Asplenium'' is a genus of about 700 species of ferns, often treated as the only genus in the family Aspleniaceae, though other authors consider ''Hymenasplenium'' separate, based on molecular phylogenetic analysis of DNA sequences, a different chromosome count, and structural differences in the rhizomes. The type species for the genus is ''Asplenium marinum''. The most common vernacular name is spleenworts, applied to the more "typical" species. '' A. nidus'' and several similar species are called bird's-nest ferns, the ''Camptosorus'' group is known as walking ferns, and distinct names are applied to some other particularly well-known species. Taxonomy and genetics Many groups of species have been separated from ''Asplenium'' as segregate genera. These include ''Camptosorus'', ''Ceterach'', ''Phyllitis'', and ''Tarachia'', but these species can form hybrids with other ''Asplenium'' species and because of this are usually included in a more broadly defined ''Asplenium''. So ...
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