Angiosperm Flora of India

Polystichum fengshanense, sp. nov. (sect. Haplopolystichum, Dryopteridaceae) from Karst Caves in Guangxi, China based on Morphological, Palynological, and Molecular Evidence

Publication Type:Journal Article
Year of Publication:2011
Authors:ZHANG, LI-BING, He, H
Journal:Systematic Botany
Date Published:2011
ISBN Number:03636445

A new fern species, Polystichum fengshanense, is described and illustrated from nine karst caves in northern Guangxi, China. It is a member of Polystichum sect. Haplopolystichum (Dryopteridaceae). A phylogenetic analysis based on chloroplast trnL-F sequences suggests that the new species is most closely related to P. cavernicola, P. minutissimum, and P. speluncicola, species described from karst caves in adjacent southern Guizhou. Morphologically, P. fengshanense can be easily distinguished from these three species by having narrow-type microscales on the abaxial laminar surface, sessile pinnae, and sori closer to the midrib. Palynologically, P. fengshanense has granulate perispore sculpturing, whereas P. cavernicola has verrucate perispore sculpturing and P. speluncicola has cristate perispore sculpturing with numerous spinules. Polystichum fengshanense is considered to be critically endangered (CR) based on IUCN red list criteria because of its restricted distribution.

Short Title:Systematic Botany
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