Argostemmaehuangzhangense (Rubiaceae), a new species from Guangdong, China

Zhong-Cheng Liu; Jia Liu; Wan-Yi Zhao; Qiang Fan; Hua-Gu Ye; Lei Wang; Wen-Bo Liao

doi:10.3897/phytokeys.214.89276

Argostemmaehuangzhangense (Rubiaceae), a new species from Guangdong, China

PhytoKeys. 2022 Nov 30:214:75-82. doi: 10.3897/phytokeys.214.89276. eCollection 2022.

Authors

Zhong-Cheng Liu^{1

2}, Jia Liu¹, Wan-Yi Zhao¹, Qiang Fan¹, Hua-Gu Ye³, Lei Wang², Wen-Bo Liao¹

Affiliations

¹ State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, China Capital Normal University Beijing China.
² College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China Sun Yan-Sen University Guangzhou China.
³ Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China South China Botanical Garden, Chinese Academy of Sciences Guangzhou China.

Abstract

Argostemmaehuangzhangense, a new Rubiaceae species from E'huangzhang Nature Reserve, Guangdong Province, China, is here described and illustrated. A morphological comparison between the new species and its putative relatives, A.lamxayanum, A.laotica and A.verticillatum, is presented. The new species is mostly similar to A.laotica, but they can be distinguished from each other since Argostemmaehuangzhangense presents solitary flower (vs. 2-flowered inflorescences), flower lobes 4 (vs. 5) and anthers opening by longitudinal slits (vs. apical pores). In a preliminary IUCN Red List status of Argostemmaehuangzhangense this species is assigned as Vulnerable (VU).

Keywords: Argostemmaehuangzhangense; China; Guangdong; Rubiaceae; new species.

Zhong-Cheng Liu, Jia Liu, Wan-Yi Zhao, Qiang Fan, Hua-Gu Ye, Lei Wang, Wen-Bo Liao.