Abstract
This study provides an updated list of Begonia occurring in Laos, and a new species is added to the checklist. The new taxon, Begonia xenos C.W.Lin, Phonep. & Rahm is similar to B. sinofloribunda Dorr in habit and leaf shape, but the new species differs in its staminate flowers having 4 tepals (vs. 2) with slightly crenulate (vs. entire) margins, pistillate flowers with 5 tepals (vs. 2 or 3) and a 2-locular (vs. 3-locular) ovary.
References
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Ding, H.B., Maw, M.B., Yang, B., Bouamanivong, S. & Tan, Y.H. (2020) An updated checklist of Begonia (Begoniaceae) in Laos, with two new species and five new records. PhytoKeys 138: 187–201. https://doi.org/10.3897/phytokeys.138.46718
Dorr, L.J. (1999) A new name in Begonia (Begoniaceae) from China. Harvard Papers in Botany 4 (1): 265.
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IUCN (2019) Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Committee. Downloadable from https://www.iucnredlist.org/resources/redlistguidelines (accessed 21 March 2022)
Lanorsavanh, S., Souvannakhoummane, K., Lamxay, V. & Chanthavongsa, K. (2021) Two new species and a new record of Begonia (Begoniaceae) from Vangvieng karst limestone in central Laos. Thai Forest Bulletin (Botany) 49 (2): 191–200. https://doi.org/10.20531/tfb.2021.49.2.06
Lanorsavanh, S., Hughes, M., Souvannakhoummane, K. & Lamxay, V. (2020) Begonia phouchomvoyensis (Begoniaceae), a new species from Laos. Taiwania 65 (1): 37–40. https://doi.org/10.6165/tai.2020.65.37
Linnaeus, C. (1753) Species plantarum, exhibentes plantas rite cognitas, ad genera relatas, cum differentiis specificis, nominibustrivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas, vol .1. Salvius, Stockholm, 1200 pp. https://doi.org/10.5962/bhl.title.59734
Moonlight, P.W., Ardi, W.H., Padilla, L.A., Chung, K.F., Fuller, D., Girmansyah, D., Hollands, R., Jara-Muñoz, A., Kiew, R., Leong, W.C., Liu, Y., Mahardika, A., Marasinghe, L.D.K., O’Connor, M., Peng, C.-I, Pérez, Á.J., Phuttai, T., Pullan, M., Rajbhandary, S., Reynel, C., Rubite, R.R., Julia, S., Scherberich, D., Shui, Y.M., Tebbitt, M.C., Thomas, D.C., Wilson, H.P., Zaini, N.H. & Hughes, M. (2018) Dividing and conquering the fastest-growing genus: Towards a natural sectional classification of the mega-diverse genus Begonia (Begoniaceae). Taxon 67: 267–323. https://doi.org/10.12705/672.3
Peng, C.-I, Wang, H., Kono, Y. & Yang, H.A. (2014) Begonia wui-senioris (sect. Platycentrum, Begoniaceae), a new species from Myanmar. Botanical Studies 55:e13. https://doi.org/10.1186/1999-3110-55-13
Phonepaseuth, P., Souladeth, P., Lanorsavanh, S., Tagane, S., Vongthavone, T. & Souvannakhoummane, K. (2021) New distribution records of Begonia L., B. murina Craib and B. poilanei Kiew (Begoniaceae: Cucurbitales) for Laos. Journal of Threatened Taxa 13 (12): 19849–19854. https://doi.org/10.11609/jott.6856.13.12.19849-19854
Shui, Y.M., Chen, W.H., Peng, H., Huang, S.H. & Liu, Z.W. (2019) Taxonomy of Begonias. Yunnan Science and Technology Press, Kunming. 468 pp.
Souvannakhoummane, K., Lanorsavanh, S., Averyanov, L.V. & Lamxay, V. (2021) Seven new species and seven new records of Begonia L. (Begoniaceae) in the flora of Laos. Turczaninowia 24 (2): 99–119. https://doi.org/10.14258/turczaninowia.24.2.12
Souvannakhoummane, K., Lanorsavanh, S., Park, J.H., Kang, H.S., Ahn, T.H., Xayalath, S. & Phongoudom, C. (2020) Begonia colliculata (Begoniaceae), a new species from Nam Kading National Protected Area, Bolikhamxai province, Laos. Thai Forest Bulletin (Botany) 48 (2): 108–113. https://doi.org/10.20531/tfb.2020.48.2.04
De Candolle, A. (1859) Mémoire sur la famille des Bégoniacées. Annales des sciences naturelles. Botanique, Ser. 4. 11: 93–149.
Ding, H.B., Maw, M.B., Yang, B., Bouamanivong, S. & Tan, Y.H. (2020) An updated checklist of Begonia (Begoniaceae) in Laos, with two new species and five new records. PhytoKeys 138: 187–201. https://doi.org/10.3897/phytokeys.138.46718
Dorr, L.J. (1999) A new name in Begonia (Begoniaceae) from China. Harvard Papers in Botany 4 (1): 265.
Hughes, M., Moonlight, P.W., Jara, A. &. Pullan, M. (2015) Begonia Resource Centre. Available from: http://padme.rbge.org.uk/begonia (accessed 25 March 2022)
IUCN (2019) Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Committee. Downloadable from https://www.iucnredlist.org/resources/redlistguidelines (accessed 21 March 2022)
Lanorsavanh, S., Souvannakhoummane, K., Lamxay, V. & Chanthavongsa, K. (2021) Two new species and a new record of Begonia (Begoniaceae) from Vangvieng karst limestone in central Laos. Thai Forest Bulletin (Botany) 49 (2): 191–200. https://doi.org/10.20531/tfb.2021.49.2.06
Lanorsavanh, S., Hughes, M., Souvannakhoummane, K. & Lamxay, V. (2020) Begonia phouchomvoyensis (Begoniaceae), a new species from Laos. Taiwania 65 (1): 37–40. https://doi.org/10.6165/tai.2020.65.37
Linnaeus, C. (1753) Species plantarum, exhibentes plantas rite cognitas, ad genera relatas, cum differentiis specificis, nominibustrivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas, vol .1. Salvius, Stockholm, 1200 pp. https://doi.org/10.5962/bhl.title.59734
Moonlight, P.W., Ardi, W.H., Padilla, L.A., Chung, K.F., Fuller, D., Girmansyah, D., Hollands, R., Jara-Muñoz, A., Kiew, R., Leong, W.C., Liu, Y., Mahardika, A., Marasinghe, L.D.K., O’Connor, M., Peng, C.-I, Pérez, Á.J., Phuttai, T., Pullan, M., Rajbhandary, S., Reynel, C., Rubite, R.R., Julia, S., Scherberich, D., Shui, Y.M., Tebbitt, M.C., Thomas, D.C., Wilson, H.P., Zaini, N.H. & Hughes, M. (2018) Dividing and conquering the fastest-growing genus: Towards a natural sectional classification of the mega-diverse genus Begonia (Begoniaceae). Taxon 67: 267–323. https://doi.org/10.12705/672.3
Peng, C.-I, Wang, H., Kono, Y. & Yang, H.A. (2014) Begonia wui-senioris (sect. Platycentrum, Begoniaceae), a new species from Myanmar. Botanical Studies 55:e13. https://doi.org/10.1186/1999-3110-55-13
Phonepaseuth, P., Souladeth, P., Lanorsavanh, S., Tagane, S., Vongthavone, T. & Souvannakhoummane, K. (2021) New distribution records of Begonia L., B. murina Craib and B. poilanei Kiew (Begoniaceae: Cucurbitales) for Laos. Journal of Threatened Taxa 13 (12): 19849–19854. https://doi.org/10.11609/jott.6856.13.12.19849-19854
Shui, Y.M., Chen, W.H., Peng, H., Huang, S.H. & Liu, Z.W. (2019) Taxonomy of Begonias. Yunnan Science and Technology Press, Kunming. 468 pp.
Souvannakhoummane, K., Lanorsavanh, S., Averyanov, L.V. & Lamxay, V. (2021) Seven new species and seven new records of Begonia L. (Begoniaceae) in the flora of Laos. Turczaninowia 24 (2): 99–119. https://doi.org/10.14258/turczaninowia.24.2.12
Souvannakhoummane, K., Lanorsavanh, S., Park, J.H., Kang, H.S., Ahn, T.H., Xayalath, S. & Phongoudom, C. (2020) Begonia colliculata (Begoniaceae), a new species from Nam Kading National Protected Area, Bolikhamxai province, Laos. Thai Forest Bulletin (Botany) 48 (2): 108–113. https://doi.org/10.20531/tfb.2020.48.2.04