Abstract
Two new species of Begonia L. (Begoniaceae), B. laotica (sect. Parvibegonia) and B. hypoleuca (sect. Reichenheimia), from north Laos are described and illustrated. Begonia augustinei, B. dryadis, B. lancangensis, B. sizemoreae and B. sillentensis subsp. mengyangensis were newly recorded taxa in Laos. Furthermore, an updated checklist of Begonia of Laos is also compiled.
Highlights
Begonia Linnaeus (1753: 1056) is the sixth largest genera of angiosperms and the number of accepted species of Begonia currently stands at 1947 (Hughes et al 2015) and is likely to rise to well over 2000 (Moonlight et al 2018; Tian et al 2018)
The annotated checklist of south east Asia Begonia by Hughes (2008) and recent taxonomic publications (Hughes 2007; Newman et al 2007; De Wilde et al 2011; Averyanov and Nguyen 2012; Souvannakhoummane et al 2016, 2018; Yang et al 2018; Averyanov et al 2019), 19 species of Begonia have been described from Laos, so far
As part of the botanical inventory of China-Laos transboundary biodiversity conservation, we carried out floristic surveys in the Phou Hin Phee National Biodiversity Conservation Area, Oudomxay Province, the Nam Ha National Biodiversity Conservation Area in Luang Namtha Province and the Phou Dean Din National Bio-Diversity Park, Phongsaly Province of northern Laos
Summary
Begonia Linnaeus (1753: 1056) is the sixth largest genera of angiosperms and the number of accepted species of Begonia currently stands at 1947 (Hughes et al 2015) and is likely to rise to well over 2000 (Moonlight et al 2018; Tian et al 2018). 1378 m elev., 25 October 2018, flowering, Y.H. Tan & H.B. Ding L0827 (holotype: HITBC!; isotypes: HNL!). Endemic to the type locality, Oudomxay Province, Maung Xai, Phou Hin Phee National Biodiversity Conservation Area, Laos.
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