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Type: Article
Published: 2016-12-20
Page range: 88–92
Abstract views: 32
PDF downloaded: 1

Pleocnemia siamensis (Dryopteridaceae), a new fern species from southern Thailand

Department of Botany, College of Biology and the Environment, Nanjing Forestry University; Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions at Nanjing Forestry University; and Collaboration Innovation Centre of Sustainable Forestry in Southern China of Jiangsu Province, 159 Longpan Road, Xuanwu District, Nanjing, 210037, P. R. China
Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166-0299, U.S.A. and Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, Sichuan 610041, P. R. China
Pteridophytes Dictyopteris limestone habitats Pleocnemia sinuses Southeast Asia

Abstract

A new fern species, Pleocnemia siamensis (Dryopteridaceae), is described and illustrated from Yala Province, southern Thailand. Pleocnemia siamensis is most similar to P. macrodonta in the dissection of laminae and morphology of sinuses, but the former has sori in one row on each side of the costules and located at the ends of the veinlets (rarely on the back of the veinlets), while the latter has sori in two rows on each side of the costules and located on the back of veinlets. Pleocnemia siamensis is described from limestone cliffs in a national park and is classified as CR-critically endangered IUCN category.