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Type: Article
Published: 2022-03-09
Page range: 281-291
Abstract views: 37
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Oreocharis hainanensis (Gesneriaceae), a new species from karst regions in Hainan Island, South China

Ministry of Education Key Laboratory for Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Hainan University, Haikou 570228, China; Center for Terrestrial Biodiversity of the South China Sea, Hainan University, Haikou 570228, China
Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China; Gesneriad Committee of China Wild Plant Conservation Association, National Gesneriaceae Germplasm Resources Bank Guangxi Institute of Botany, Gesneriad Conservation Center of China, Guilin 541006, Guangxi, China
Ministry of Education Key Laboratory for Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Hainan University, Haikou 570228, China; Center for Terrestrial Biodiversity of the South China Sea, Hainan University, Haikou 570228, China
Morphology Molecular New taxon Karst Eudicots

Abstract

Oreocharis hainanensis, a new species of Gesneriaceae is described and illustrated from low-altitudual karst areas in Hainan Island, South China. The new species is easily distinguished from its closely-related O. jasminina by campanulate floral tube, zygomorphic corolla and exserted stamens. It also shows different habitats from the four currently-recognized Oreocharis taxa on the island. Molecular phylogeny analysis based on plastid trnL-trnF and nuclear ITS1/2 sequences supported the delimitation of the new species, which forms a monophyletic clade with all the other Oreocharis taxa from Hainan Island. The roles of habitat and floral isolation in the evolution of the new species and its affinities are discussed. The species was assessed as Vulnerable (VU C1 and D2) according to IUCN Red List Categories and Criteria.

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