Three new species of Polystichum (Dryopteridaceae) from China

Three new species of Polystichum (Dryopteridaceae), P. paramartini R. H. Jiang et X. C. Zhang, P. sublanceolatum R. H. Jiang et X. C. Zhang, and P. venosum R. H. Jiang et X. C. Zhang, are described and illustrated. They are all from the limestone mountains in South and Southwest China. The first two species are found in limestone caves while the third one occurs on limestone mountain slopes. Detailed descriptions, line drawings, ecological preferences, conservation status are provided.

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