Polystichum clarinervium (subg. Haplopolystichum; Dryopteridaceae), a new fern from Emei shan, China

CHUN-XIANG LI; NIKISHA R. PATEL; LI-BING ZHANG

doi:10.11646/phytotaxa.280.3.5

Issue: Vol. 280 No. 3: 21 October 2016

Type: Article

Published: 2016-10-21

DOI: 10.11646/phytotaxa.280.3.5

Page range: 271–277

Abstract views: 28

PDF downloaded: 1

Polystichum clarinervium (subg. Haplopolystichum; Dryopteridaceae), a new fern from Emei shan, China

CHUN-XIANG LI⁺⁻
NIKISHA R. PATEL⁺⁻
LI-BING ZHANG⁺⁻

State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China.

Pringle Herbarium, Department of Plant Biology, The University of Vermont, Burlington, VT, U.S.A.

Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166-0299, U.S.A.

Emei shan P. crassinervium P. dangii P. deltodon P. peishanii Pteridophytes

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Abstract

A new fern species, Polystichum clarinervium, a member of P. subg. Haplopolystichum (Dryopteridaceae), is described and illustrated from Emei shan, Sichuan Province, Southwest China. The new species is similar to P. deltodon, but the former has pinnae slightly imbricate, pinna apex rounded, and veins clear, while the latter has pinnae not imbricate, pinna apex acute, and veins obscured. Polystichum clarinervium was found on a limestone slope under sparse forest at an elevation of 1300 m and is currently known from two small populations. It is classified as Critically Endangered (CR) following IUCN Red List criteria.