Diplazium clivicolum (Polypodiales, Athyriaceae), a new fern species from southern Yunnan, China

A new species in Athyriaceae, Diplazium clivicolum (section Anisogonium) is described and illustrated from southern Yunnan, China. Diplazium clivicolum exhibits the greatest morphological similarity to D. incomptum , particularly in lamina division, but can be reliably differentiated, based on lamina width and lobe shape. Molecular phylogenetic analysis demonstrates that the new species is closely related to D. petiolare , despite low morphological concordance. This study focuses on comparing the morphological characteristics of these three species.