Polystichum loratum (Dryopteridaceae), a New Fern Species from Guizhou, China
Polystichum loratum (Dryopteridaceae), a New Fern Species from Guizhou, China
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DOI：
10.3417/2012045
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发表时间：
2012-11
期刊：
影响因子：
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通讯作者：
Hai He;Yong-Qing Yang;Li‐Bing Zhang
中科院分区：
文献类型：
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作者：
Hai He;Yong-Qing Yang;Li‐Bing Zhang
摘要。在贵州北部的石灰岩悬崖上，描述了一种新的蕨类植物——loratum Polystichum H. He和Li Bing Zhang。loratum Polystichum与P. yaanense Zhang Liang & Li Bing Zhang最相似的是具有狭卵形到披针形的轴轴鳞片。新种的主要特征是叶片呈扁圆形，耳廓背面长圆形至窄卵形的微鳞（宽型）和膨化型；yaanense新种的叶片呈披针形，耳廓背面钻形的微鳞（窄型）和膨化型。根据世界自然保护联盟红色名录标准，loratum Polystichum被认为是极度濒危物种（CR）。
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.