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Issue: Vol. 749 No. 1: 25 Mar. 2026
Type: Article
Published: 2026-03-25
DOI: 10.11646/phytotaxa.749.1.4
Page range: 66-76
Abstract views: 0
PDF downloaded: 0

Elaphoglossum hainanense, a new species of Dryopteridaceae from Hainan, China

College of Forestry, Central South University of Forestry and Technology, Changsha 410004, Hunan, China; Key Laboratory of National Forestry and Grass-land Administration for Orchid Conservation and Utilization, the National Orchid Conservation & Research Center of Shenzhen, Shenzhen, 518114, China
Key Laboratory of National Forestry and Grass-land Administration for Orchid Conservation and Utilization, the National Orchid Conservation & Research Center of Shenzhen, Shenzhen, 518114, China
Key Laboratory of National Forestry and Grass-land Administration for Orchid Conservation and Utilization, the National Orchid Conservation & Research Center of Shenzhen, Shenzhen, 518114, China
Key Laboratory of National Forestry and Grass-land Administration for Orchid Conservation and Utilization, the National Orchid Conservation & Research Center of Shenzhen, Shenzhen, 518114, China
College of Forestry, Central South University of Forestry and Technology, Changsha 410004, Hunan, China
Key Laboratory of National Forestry and Grass-land Administration for Orchid Conservation and Utilization, the National Orchid Conservation & Research Center of Shenzhen, Shenzhen, 518114, China; Shenzhen Key Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Sciences, Shenzhen, Guangdong, 518004, China
Elaphoglossoideae phylogeny taxonomy Hainan Island Elaphoglossum acrostichoides Pteridophytes

Abstract

Elaphoglossum hainanense (Dryopteridaceae), a new fern species from the National Park of Hainan Tropical Rainforest, China, is described. Compared to its Chinese congeners, the most prominent features of this new species are its prominent veins and glabrous laminae. It exhibits morphological similarities to E. acrostichoides, which is distributed in Africa and the western Indian Ocean islands, and to E. angulatum and E. yunnanense from Hainan, China. However, it differs significantly from these three species in leaf and rhizome scale morphology. Molecular phylogenetic analysis based on chloroplast rbcL, rps4-trnS, and trnL-trnF sequences shows that all sampled individuals of E. hainanense form a distinct clade. Given its restricted geographic range, small population size and limited number of individuals, E. hainanense should be considered endangered (EN), according to the IUCN Red List categories and criteria.

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How to Cite

Yang, Y.-J., Li, J., Chen, L.-J., Yan, Y.-H., Wu, L. & Shu, J.-P. (2026) Elaphoglossum hainanense, a new species of Dryopteridaceae from Hainan, China. Phytotaxa 749 (1): 66–76. https://doi.org/10.11646/phytotaxa.749.1.4