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Issue: Vol. 646 No. 2: 2 May 2024
Type: Article
Published: 2024-05-02
DOI: 10.11646/phytotaxa.646.2.9
Page range: 203-212
Abstract views: 55
PDF downloaded: 6

Two new species of Platanthera (Orchidaceae, Orchidoideae) from Xizang, China

State Key Laboratory of Plant Diversity and Prominent Crops, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Xiangshan, Beijing, 100093, China, China National Botanical Garden, Beijing, 100093, China, University of Chinese Academy of Sciences, Beijing, 100093, China
State Key Laboratory of Plant Diversity and Prominent Crops, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Xiangshan, Beijing, 100093, China, China National Botanical Garden, Beijing, 100093, China
State Key Laboratory of Plant Diversity and Prominent Crops, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Xiangshan, Beijing, 100093, China, China National Botanical Garden, Beijing, 100093, China, University of Chinese Academy of Sciences, Beijing, 100093, China
Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Yunnan 666303, China
State Key Laboratory of Plant Diversity and Prominent Crops, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Xiangshan, Beijing, 100093, China, China National Botanical Garden, Beijing, 100093, China
Monocots Orchid taxonomy Platanthera linzhiensis Platanthera deergongensis flora

Abstract

Two new orchid species, Platanthera linzhiensis, P. deergongensis, are described and illustrated from Motuo, Xizang, China. P. linzhiensis is closely related to P. uniformis, but differs from it by lip yellowish green, spur yellow, nearly as long as ovary, connective obtuse-truncate, not protruding from anther, column lateral appendages ovate to oblong, slightly shorter than the anther. P. deergongensis is morphologically similar to P. contigua, but is distinguished from it by having white lip, obtuse-truncate connective and ovate to oblong column lateral appendages. Molecular phylogenetic analysis based on six markers (nrITS, psaB, matK, psbA-trnH, rbcL, trnL-F) revealed that P. linzhiensis and P. deergongensis formed a clade with high support, and are close to P. superantha.

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