@ARTICLE{TreeBASE2Ref18542, author = {L. B. Zhang and Hai He}, title = {Polystichum speluncicola sp. nov. (sect. Haplopolystichum, Dryopteridaceae) based on morphological, palynological, and molecular evidence with reference to the non-monophyly of Cyrtogonellum.}, year = {2010}, keywords = {}, doi = {10.1600/036364410790862605}, url = {}, pmid = {}, journal = {Systematic Botany}, volume = {35}, number = {1}, pages = {13--19}, abstract = {A new fern species, Polystichum speluncicola (sect. Haplopolystichum, Dryopteridaceae), is described from a karst cave in southern Guizhou, China. The new species has deltoid-ovate pinnae and subulate microscales with dilated base on abaxial lamina surface (broad-type microscales), characters unknown for any other members of sect. Haplopolystichum. Additionally, the new species has a few other distinctive morphological features. It has oblanceolate lamina and its pinnae are repand on margin, obtuse at apex, with acroscopic base round and basiscopic base attached at 20 60-degree angles to rachis, subcoriaceous, illustrous adaxially, densely arranged, and strongly reflexed and contracted towards lamina base. Palynologically, P. speluncicola has cristate sculpture with numerous spinules on its perispore. A preliminary phylogenetic analysis based on the DNA sequences of the trnL-F intergenic spacer showed that P. speluncicola, together with P. subacutidens, P. yuanum , and species of Cyrtomium subser. Balansana, formed an unresolved polytomy. Polystichum speluncicola can easily be distinguished morphologically from these three species by having broad-type microscales, deltoid-ovate pinnae, and much fewer pairs of pinnae per lamina. Our phylogenetic analysis resolved the genus Cyrtogonellum as paraphyletic in relation to Polystichum sect. Haplopolystichum s.l.} }

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