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Issue: Vol. 778 No. 3: 9 Oct. 2026
Type: Article
Published: 2026-10-09
DOI: 10.11646/phytotaxa.778.3.5
Page range: 270-280
Abstract views: 16
PDF downloaded: 0

Amitostigma chamoense (Orchidaceae, Orchidinae), a new species from Xizang, China

Co-Innovation Center for Sustainable Forestry in Southern China; College of Life Sciences; Nanjing Forestry University; Nanjing 210037; Jiangsu; China
Co-Innovation Center for Sustainable Forestry in Southern China; College of Life Sciences; Nanjing Forestry University; Nanjing 210037; Jiangsu; China
Co-Innovation Center for Sustainable Forestry in Southern China; College of Life Sciences; Nanjing Forestry University; Nanjing 210037; Jiangsu; China
Co-Innovation Center for Sustainable Forestry in Southern China; College of Life Sciences; Nanjing Forestry University; Nanjing 210037; Jiangsu; China; Ningbo Key Laboratory of Ornamental Plant Genetics; Breeding and Utilization; Ningbo City College of Vocational Technology; Ningbo 315000; Zhejiang; China
Central South Inventory and Planning Institute of National Forestry and Grassland Administration; Changsha 410014; Hunan; China
Mountain Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province; Chengdu Institute of Biology; Chinese Academy of Sciences; Chengdu 610041; Sichuan; China
Mountain Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province; Chengdu Institute of Biology; Chinese Academy of Sciences; Chengdu 610041; Sichuan; China
Germplasm Bank of Wild Species; Kunming Institute of Botany; Chinese Academy of Sciences; Lanhei Road 132; Heilongtan; Kunming; Yunnan 650201; China
Monocots Amitostigma molecular phylogenetics morphology new taxon Xizang

Abstract

A new orchid species Amitostigma chamoense, from Motuo and Chayu County, Xizang, China, is described here based on morphological characters and molecular phylogenetic evidence. Amitostigma chamoense is morphologically close to A. basifoliatum and A. motuoense , but can be readily distinguished by its linear leaf, rachis bearing 2–5 flowers, sepals and petals yellowish green and frequently suffused with reddish maroon abaxially, petals dorsally carinate, apices of lobes slightly undulate, and spur apex emarginate. Molecular phylogenetic study using two nuclear markers (nrITS and Xdh) and three plastid markers (matK, psbA-trnH, and trnL-F) recovered A. chamoense as sister to A. nanum.

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How to Cite

Liao, W.-H., Liu, S.-Q., Qu, K., Li, M., Zhang, T., Yu, Q., Xu, B. & Ya, J.-D. (2026) Amitostigma chamoense (Orchidaceae, Orchidinae), a new species from Xizang, China. Phytotaxa 778 (3): 270–280. https://doi.org/10.11646/phytotaxa.778.3.5