''Hymenasplenium'' is one of three

genera Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial ...

fern A fern (Polypodiopsida or Polypodiophyta ) is a member of a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. The polypodiophytes include all living pteridophytes except ...

s in the

Aspleniaceae The Aspleniaceae (spleenworts) are a family of ferns, included in the order Polypodiales. The composition and classification of the family have been subject to considerable changes. In particular, there is a narrow circumscription, Aspleniaceae ...

(spleenwort family), in the

eupolypods II Aspleniineae is a suborder of ferns in the order Polypodiales. It is equivalent to the clade eupolypods II in earlier systems; it is also treated as a single very broadly defined family Aspleniaceae. The suborder generally corresponds with th ...

clade of the order

Polypodiales The order Polypodiales encompasses the major lineages of polypod ferns, which comprise more than 80% of today's fern species. They are found in many parts of the world including tropical, semitropical and temperate areas. Description Polypodiale ...

. The others are ''

Hemidictyum ''Hemidictyum'' is a genus of ferns with a single species, ''Hemidictyum marginatum'', commonly known as the marginated half net fern. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is the only genus in the family Hemidict ...

'' and ''

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 differen ...

''. ''Hymenasplenium'' was segregated because it is a natural grouping with differing rhizome morphology – dorsiventral v. radial for the rest of Asplenium, differing chromosome count – x=39 v. x=36 for the rest of Asplenium, and a clear monophyletic grouping based on genetic analysis. It was confirmed as a sister group to ''

'' in a 2015 molecular study of the genera.

Selected species

*''

Hymenasplenium basiscopicum ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

'' *''

Hymenasplenium cardiophyllum ''Hymenasplenium cardiophyllum'' is a species of fern in the family Aspleniaceae. It is native to China and Japan. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss Habitat destructio ...

'' *''

Hymenasplenium cheilosorum ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae The Aspleniaceae (spleenworts) are a family of ferns, included in the order Polypodiales. The composition and classification of the family have been subject to considerable ...

'' *''

Hymenasplenium delitescens ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

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Hymenasplenium hoffmannii ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

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Hymenasplenium ikenoi ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

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Hymenasplenium laetum ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

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Hymenasplenium obtusifolium ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

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Hymenasplenium ortegae ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

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Hymenasplenium purpurascens ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

'' *''

Hymenasplenium repandulum ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

'' *''

Hymenasplenium riparium ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

'' *''

Hymenasplenium triquetrum ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

'' *''

Hymenasplenium unilaterale ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

'' *''

Hymenasplenium volubile ''Hymenasplenium'' is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales. The others are '' Hemidictyum'' and '' Asplenium''. ''Hymenasplenium'' was segregated because it i ...

References

Aspleniaceae Fern genera {{Polypodiales-stub