Begonia catbensis (sect. Coelocentrum, Begoniaceae), a new species from northern Vietnam

Li-Na Dong; Khang Sinh Nguyen; Yu-Min Shui; Hieu Quang Nguyen; Wei-Bin Xu; Xuan Khu Nguyen

doi:10.3897/phytokeys.179.65812

Begonia catbensis (sect. Coelocentrum, Begoniaceae), a new species from northern Vietnam

PhytoKeys. 2021 Jun 17:179:1-12. doi: 10.3897/phytokeys.179.65812. eCollection 2021.

Authors

Li-Na Dong¹, Khang Sinh Nguyen², Yu-Min Shui³, Hieu Quang Nguyen⁴, Wei-Bin Xu¹, Xuan Khu Nguyen⁵

Affiliations

¹ Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, Guangxi, China Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences Guilin China.
² Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, 100000, Vietnam Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology Hanoi Vietnam.
³ CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China Kunming Institute of Botany, Chinese Academy of Sciences Kunming China.
⁴ Center for Plant Conservation of Vietnam (CPC), Vietnam Union of Science and Technology Associations, 25/32 Lane 191, Lac Long Quan Rd., Hanoi, Vietnam Center for Plant Conservation of Vietnam Hanoi Vietnam.
⁵ Cat Ba National Park, Tran Chau, Cat Hai, Hai Phong, Vietnam Cat Ba National Park Hai Phong Vietnam.

Abstract

Begonia catbensis, a new species in Begonia sect. Coelocentrum is described and illustrated. The new species was discovered in lowland limestone hills at Cat Ba National Park and can be easily distinguished from all its congeners by having dendritic hairs on the petiole, adaxial veins and stipules, fimbriate bracts and bracteoles, dense conical bullae on the upper surface of the leaf blade, two tepals in the pistillate flowers and a glabrescent ovary with verrucose wings. Based on IUCN Criteria, the species is currently assessed as "Endangered" (D).

Keywords: Begonia; Cat Ba; Vietnam; endangered plant; new species.

Li-Na Dong, Khang Sinh Nguyen, Yu-Min Shui, Hieu Quang Nguyen, Wei‑Bin Xu, Xuan Khu Nguyen.