Tags: Fern.

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 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.

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