New Species of Resedaceae Found in Dehong, Yunnan (Botany)

Resedaceae is a family of mainly Mediterranean herbs. The genus Stixis is one of the six genera in family Resedaceae. To date, China has recorded three species and one subspecies of the genus Stixis, and all these species were reported in Yunnan province. 

When surveying Extremely Small Population of plants in southwest Yunnan, researchers from the Xishuangbanna Tropical Botanical Garden (XTBG) of the Chinese Academy of Sciences and Yunnan Tongbiguan provincial Nature Reserve collected an unknown species in Dehong. After careful morphological study and literature review, they confirmed the species was new to science. 

The new species was named Stixis yingjiangensis, referring to the type locality, Yingjiang County, Dehong Dai and Jingpo Autonomous Prefecture, Yunnan, China. It was published in Taiwania

Stixis yingjiangensis is morphologically similar to S. philippinensis and S. villiflora, but differs from the two species by both surfaces with sparsely strigillose on lateral nerves, midrib and pustules, inflorescences axillary, filaments lower third pubescent, upper two thirds glabrous, ovary glabrous, etc. 

Currently, only two populations have been found in Yingjiang County, the first population (eight individuals were observed) is in Nabang Town, climbs trees at the edge of the forest. The second population (only two individuals were observed) is in Kachang Town, grows by the roadside. 

Since the species is found on the border between China and Myanmar, and the investigation in China has not been through enough to fully understand the natural distribution of the species. The researchers proposed the conservation status of Stixis yingjiangensis as Data Deficient (DD) according to the Red List criteriaof the International Union for Conservation of Nature. 

Stixis yingjiangensis (Image by SHEN Jianyong) 
Stixis yingjiangensis (Image by SHEN Jianyong) 
Stixis yingjiangensis (Image by SHEN Jianyong)  
Stixis yingjiangensis (Image by SHEN Jianyong) 

Featured image: Stixis yingjiangensis (Image by SHEN Jianyong) 


Reference: Jian-Yong Shen, Xing-Da Ma, Qiang-Bang Gong, Guo-Hui Huang, Xue-Lian Yang, Ji-Pu Shi, “Stixis yingjiangensis, a new species of Resedaceae from Yunnan, China”, Taiwania, Page: 326 – 331. DOI: 10.6165/tai.2021.66.326


Provided by Chinese Academy of Sciences

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