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Issue: Vol. 479 No. 1: 7 January 2021
Type: Article
Published: 2021-01-07
DOI: 10.11646/phytotaxa.479.1.9
Page range: 114–120
Abstract views: 36
PDF downloaded: 1

Polystichum dongchuanense and P. menglaense (subg. Haplopolystichum; Dryopteridaceae), two new ferns from Yunnan, China

Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, Sichuan 610041, China 2School of Life Sciences, Yunnan University, East Outer Ring Road, Chenggong District, Kunming, Yunnan 650500, China
2School of Life Sciences, Yunnan University, East Outer Ring Road, Chenggong District, Kunming, Yunnan 650500, China
Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, Sichuan 610041, China Missouri Botanical Garden, 4344 Shaw Blvd., St. Louis, MO 63110, U.S.A.
Critically Endangered species flora of Yunnan limestone habitat perispore Pteridophytes

Abstract

Two new fern species, Polystichum dongchuanense and P. menglaense (Dryopteridaceae), are described and illustrated from Yunnan, China. Both are members of P. subg. Haplopolystichum sect. Haplopolystichum. Polystichum dongchuanense is most similar to P. acutidens in plant size and pinna size, but the two can be distinguished from each other by pinna serration and soral number on pinnae. Polystichum menglaense is most similar to P. deltodon in plant size, but the two are different in pinna shape and soral distribution. Both new species have extremely narrow distributions and are classified as Critically Endangered (CR) following IUCN Red List Criteria.