Pulvinatusia (Brassicaceae), a new cushion genus from China and its systematic position

Hong-Liang Chen; Ihsan A Al-Shehbaz; Li-Shen Qian; Jian-Wen Zhang; Bo Xu; Ti-Cao Zhang; Ji-Pei Yue; Hang Sun

doi:10.3897/phytokeys.189.77926

Pulvinatusia (Brassicaceae), a new cushion genus from China and its systematic position

PhytoKeys. 2022 Jan 24:189:9-28. doi: 10.3897/phytokeys.189.77926. eCollection 2022.

Authors

Hong-Liang Chen^{1

2}, Ihsan A Al-Shehbaz³, Li-Shen Qian^{1

4}, Jian-Wen Zhang¹, Bo Xu⁵, Ti-Cao Zhang⁶, Ji-Pei Yue¹, Hang Sun¹

Affiliations

¹ CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China Kunming Institute of Botany, Chinese Academy of Sciences Kunming China.
² Laboratory of Systematics & Evolutionary Botany and Biodiversity, College of Life Science, Zhejiang University, Hangzhou 310058, Zhejiang, China Zhejiang University Hangzhou China.
³ Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, Missouri 63110, USA Missouri Botanical Garden St. Louis United States of America.
⁴ University of Chinese Academy of Sciences, Beijing 100049, China University of Chinese Academy of Sciences Beijing China.
⁵ College of Forestry, Southwest Forestry University, Kunming 650224, Yunnan, China Southwest Forestry University Kunming China.
⁶ College of Chinese Material Medica, Yunnan University of Chinese Medicine, Kunming 650500, Yunnan, China Yunnan University of Chinese Medicine Kunming China.

Abstract

The new genus and species Pulvinatusiaxuegulaensis (Brassicaceae) are described and illustrated. The species is a cushion plant collected from Xuegu La, Xizang, China. Its vegetative parts are most similar to those of Arenariabryophylla (Caryophyllaceae) co-occurring in the same region, while its leaves and fruits closely resemble those of Xerodrabapatagonica (Brassicaceae) from Patagonian Argentina and Chile. Family-level phylogenetic analyses based on both nuclear ITS and plastome revealed that it is a member of the tribe Crucihimalayeae, but the infra-/intergeneric relationships within the tribe are yet to be resolved.

Keywords: Crucihimalayeae; Xizang; cushion plants; molecular phylogenetics; new species.

Hong-Liang Chen, Ihsan A. Al-Shehbaz, Li-Shen Qian, Jian-Wen Zhang, Bo Xu, Ti-Cao Zhang, Ji-Pei Yue, Hang Sun.