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Issue: Vol. 313 No. 3: 18 July 2017
Type: Correspondence
Published: 2017-07-18
DOI: 10.11646/phytotaxa.313.3.10
Page range: 296–300
Abstract views: 23
PDF downloaded: 1

Polystichum luteoviride (subg. Haplopolystichum; Dryopteridaceae), a new, highly endangered cave species from Guizhou, China

International Cultivar Registration Center for Osmanthus, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, Jiangsu, P. R. China
Department of Biology, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam.
Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166-0299, U.S.A.
Guizhou karst cave Polystichum luteoviride Pteridophytes

Abstract

One new fern species, Polystichum luteoviride, a member of P. subg. Haplopolystichum (Dryopteridaceae), is described and illustrated from Guizhou Province in Southwest China. Polystichum luteoviride is similar to P. deflexum Ching ex W.M.Chu (1992: 47) in having crenate pinna margins, but the former has lamina yellowish green and pinnae oblong, strongly reflexed, and acute to obtuse at apex, while the latter has laminae green and pinnae lanceolate, slightly reflexed or even angled acroscopically, and acuminate at apex. Polystichum luteoviride was found inside a karst cave at an elevation of 1200 m with humid and shady conditions and is currently known from one population in Ziyun County, southern Guizhou, and is classified as Critically Endangered (CR) following IUCN Red List criteria.