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30 November 2012 Polystichum loratum (Dryopteridaceae), a New Fern Species from Guizhou, China
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Abstract

A new fern species, Polystichum loratum H. He & Li Bing Zhang (Dryopteridaceae), is described and illustrated from limestone cliffs in northern Guizhou Province, China. Polystichum loratum is most similar to P. yaanense Liang Zhang & Li Bing Zhang in having narrowly ovate to lanceolate abaxial rachis scales. The new species is distinguished by its lorate leaf lamina, the oblong to narrowly ovate microscales (broad-type) on abaxial pinna surfaces, and the exindusiate sori, while P. yaanense has lanceolate leaf lamina, subulate microscales (narrow-type) on abaxial pinnae, and indusiate sori. Polystichum loratum is considered to be Critically Endangered (CR), based on IUCN Red List criteria.

Hai He, Yong-Qing Yang, and Li-Bing Zhang "Polystichum loratum (Dryopteridaceae), a New Fern Species from Guizhou, China," Novon: A Journal for Botanical Nomenclature 22(2), (30 November 2012). https://doi.org/10.3417/2012045
Published: 30 November 2012
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