(2006a) highlighted a possible trend of increasing pinnation in Serpocaulon , but the fact their results showed S. levigatum to be closely related to species with completely free, non-adnate pinnae would make the entire lamina shared with P. chrysolepis a homoplastic feature.
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<i>Adetogramma</i> (Polypodiaceae), a new monotypic fern genus segregated from Polypodium.
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