New taxa of tribe Gastrodieae (Epidendroideae, Orchidaceae) from Yunnan, China and its conservation implication

doi:10.1016/j.pld.2021.06.001

Plant Diversity ›› 2021, Vol. 43 ›› Issue (05): 420-425.DOI: 10.1016/j.pld.2021.06.001

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New taxa of tribe Gastrodieae (Epidendroideae, Orchidaceae) from Yunnan, China and its conservation implication

Qiang Liu^a, Ji-Dong Ya^b, Xun-Feng Wu^a, Bing-Yi Shao^c, Kuan-Bo Chi^d, Hai-Lei Zheng^e, Jian-Wu Li^f, Xiao-Hua Jin^c

a Yunnan Forestry Technological College, Jindian Road, Panlong District, Kunming, Yunnan, 650224, China;
b Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Heilongtan, Kunming, Yunnan, 650201, China;
c State Key Laboratory of Systematic and Evolutionary Botany & Herbarium (PE), Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China;
d Southwest Forestry University, Kunming, 650224, China;
e China Wild Dali Nature Education and Research Center, Dali, Yunnan, 671000, China;
f Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, 666303, China

Received:2020-10-31 Revised:2021-05-27 Online:2021-10-25 Published:2021-11-18
Contact: Xiao-Hua Jin
Supported by:
This work was financially supported by National Forestry and Grassland Administration, China (No. 2019073018), and Doctoral Program of Yunnan Forestry Technological College (KY (ZD) 201905) to Q. Liu. We are grateful for staff of Haifeng Natural Reserve in Zhanyi County for his kind help in the field work.

Abstract

Abstract: Gastrodia longistyla, a new species of Orchidaceae from Yunnan Province, China, is described and illustrated. It is morphologically similar to Gastrodia peichatieniana, but can be easily distinguished from the latter by having a rhombic epichile, long column (6.0-7.5 mm long), and a needle-shaped appendage (1.8-3.2 mm in length) at the base of the stigma. Identification key and colour photographs are provided. A preliminary risk-of-extinction assessment, according to the IUCN Red List Categories and Criteria, is given for the new species. The plastome of G. longistyla is 30464 bp in length with GC content approximately 24.8%, and the plastome does not contain some housekeeping genes, such as matK, rpl16, or all photosynthesis genes. In addition, the G. longistyla plastome lacks an IR region. This indicates that the plastome is in the last stage of degradation.

Key words: Gastrodia, Taxonomy, New species, Gastrodieae, Orchidaceae, China

Qiang Liu, Ji-Dong Ya, Xun-Feng Wu, Bing-Yi Shao, Kuan-Bo Chi, Hai-Lei Zheng, Jian-Wu Li, Xiao-Hua Jin. New taxa of tribe Gastrodieae (Epidendroideae, Orchidaceae) from Yunnan, China and its conservation implication[J]. Plant Diversity, 2021, 43(05): 420-425.

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New taxa of tribe Gastrodieae (Epidendroideae, Orchidaceae) from Yunnan, China and its conservation implication

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