Polystichum loratum (Dryopteridaceae), a New Fern Species from Guizhou, China

• Hai He ^[1] ; Yong-Qing Yang ^[1] ; Li-Bing Zhang ^{[2] [3]}
  1. [1] Chongqing Normal University

     Chongqing Normal University

     China

     
  2. [2] Chinese Academy of Sciences

     Chinese Academy of Sciences

     China

     
  3. [3] Missouri Botanical Garden

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• Localización: Novon: a journal for botanical nomenclature, ISSN 1055-3177, Vol. 22, Nº. 2, 2012, págs. 166-169
• Idioma: inglés
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• Resumen

  • 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.