Research Paper
Two new species, Begonia dinhtuana and B. caelata (sect. Platycentrum, Begoniaceae) from North Vietnam
Khang Sinh Nguyen, Van Thanh Bui, Thi Van Anh Nguyen, Che Wei Lin
Published on: 08 January 2026
Page: 55 - 63
DOI: 10.6165/tai.2026.71.55
Abstract
The number of described species of Begonia has increased rapidly over the past decade, particularly in the Indochinese region. In Vietnam, many newly discovered species are narrowly distributed, often restricted to a single or a few adjacent mountains. Here, we describe two new species from northern Vietnam, Begonia dinhtuana and B. caelata, both of which belong to Begonia sect. Platycentrum. Detailed morphological descriptions, illustrations, and comparisons with closely related taxa are provided to support their taxonomic recognition.
Keyword: biodiversity, endemism, flora of Vietnam, Indochina, Lao Cai Province, plant diversity, taxonomy
Literature Cited
Anh, T.T.P., Thanh, N.T., Quang, B.H., Binh, T.D., Thanh, T.X., Le, A.T., Nguyen, K.S., Lin, C.W. 2024 Begonia triquetra (sect. Platycentrum, Begoniaceae), a new subpeltate-leaved species from limestone hills in Son La Province, Northwestern Vietnam. Phytotaxa 674(3): 281–287.
DOI: 10.11646/phytotaxa.674.3.5View Article
Google Scholar
Averyanov, L.V., Nguyen, K.S., Maisak, T.V., Nguyen, H.T., Nguyen, H.Q. 2019 Two new species of Begonia L. (Begoniaceae) from central Laos. Turczaninowia 22(2): 134–141.
DOI: 10.14258/turczaninowia.22.2.9View Article
Google Scholar
Averyanov, L.V., Nuraliev, M.S., Konstantinov, E.L., Maisak, T.V., Kopylov-Guskov, Y.O., Lyskov, D.F., Quang, B.H., Kuznetsov, A.N., Kuznetsov, S.P., Nguyen, K.S., Shui, Y.M. 2021 New and noteworthy species of Begonia (Begoniaceae) from Vietnam and Laos. Phytotaxa 522(2): 75–93.
DOI: 10.11646/phytotaxa.522.2.1View Article
Google Scholar
Bon, T.N., Do, T.T.H., Le, T.H., Lo, M.D., Zimmer, H.D., Lin, C.W. 2023a Begonia saxifragoides sp. nov. and two new records of Begonia (Begoniaceae) from northern Vietnam. Phytotaxa 600(1): 16–24.
DOI: 10.11646/phytotaxa.600.1.3View Article
Google Scholar
Bon, T.N., Gratzfeld, J., Tuyet, T.T.A., Lin, C.W. 2023b Begonia tui, a new species of Begonia sect. Coelocentrum from Quang Binh Province, Central Vietnam. Taiwania 68(4): 412?416.
DOI: 10.6165/tai.2023.68.412View Article
Google Scholar
Bui, D.T., Nguyen, C.H., Tran, T.N., Nguyen, L.V., Lin, C.W. 2024 Begonia nahauensis (sect. Platycentrum, Begoniaceae), a new species from northern Vietnam. Phytotaxa 662(1): 115–120.
DOI: 10.11646/phytotaxa.662.1.10View Article
Google Scholar
Hoang, T.S., Lin, C.W., Vu, A.T. 2021a A new species and record for the genus Begonia (Begoniaceae) from Vietnam. Taiwania 66(3): 317–325.
DOI: 10.6165/tai.2021.66.317View Article
Google Scholar
Hoang, T.S., Lin, C.W. 2021b Two new species of Begonia (sect. Platycentrum, Begoniaceae) from the Central Highlands of Vietnam: B. villosula and B. lophura. Phytotaxa 510(3): 263–274.
DOI: 10.11646/phytotaxa.510.3.6View Article
Google Scholar
Hoang, T.S., Lin, C.W. 2022a Begonia tuanii (sect. Platycentrum, Begoniaceae), a new species from Lao Cai Province, North Vietnam. Phytotaxa 567(3): 294–300.
DOI: 10.11646/phytotaxa.567.3.9View Article
Google Scholar
Hoang, T.S., Lin, C.W. 2022b Two new species, Begonia minhaniae and B. dieuanhiae (sect. Platycentrum, Begoniaceae), from northwestern Vietnam. Phytotaxa 572(1): 87–96.
DOI: 10.11646/phytotaxa.572.1.6View Article
Google Scholar
Hughes, M., Moonlight, P.W., Jara, A., Pullan, M. 2015–Present Begonia Resource Centre. Available from: http://padme.rbge.org.uk/begonia [accessed 28 July 2025]
Irmscher, E. 1951 Some new Chinese species of Begonia. Notes Roy. Bot. Gard. Edinburgh 21: 35–45.
IUCN Standards and Petitions Committee 2024 Guidelines for Using the IUCN Red List Categories and Criteria, version 16. Prepared by the Standards and Petitions Committee, 122 pp. [https://www.iucnredlist.org/documents/RedListGuidelines.pdf] (accessed 28 July 2025)
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 Bull., Bot. 49(2): 191–200.
DOI: 10.20531/tfb.2021.49.2.06View Article
Google Scholar
Lin, C.W., Hsu, T.C., Luu, H.T., Nguyen, I.L.P.T., Yang, T.Y.A., Li, C.W. 2021 Revision of Begonia (Begoniaceae) in Bidoup-Nui Ba National Park, Southern Vietnam, including two new species. Phytotaxa 496(1): 77–89.
DOI: 10.11646/phytotaxa.496.1.4View Article
Google Scholar
Lin, C.W., Phonepaseuth, P., Rahm, P. 2022 Begonia xenos—a new species and an updated checklist of Begonia in Laos. Phytotaxa 543(3): 193–202.
DOI: 10.11646/phytotaxa.543.3.4View Article
Google Scholar
Luu, H.T., Duong, Q.H., Le, K.Q., Lin, C.W. 2022 Begonia yentuensis and B. khaucaensis (Begoniaceae), two new species from northern Vietnam. Phytotaxa 560(2): 222–232.
DOI: 10.11646/phytotaxa.560.2.5View Article
Google Scholar
Nguyen, C.H., Le, A.T., Ha, V.B., Lin, C.W. 2024 Begonia dakrongensis (Begoniaceae), a new species from Dakrong Nature Reserve, Quang Tri Province in Central Vietnam. Phytotaxa 645(1): 85–90.
DOI: 10.11646/phytotaxa.645.1.8View Article
Google Scholar
Nguyen, C.H., Bui, H.V., Le, A.T., Pham, D.V., Lin, C.W. 2025 Five new species of Begonia (Begoniaceae) from Vietnam. Phytotaxa 698(2): 82–100.
DOI: 10.11646/phytotaxa.698.2.2View Article
Google Scholar
Pham, V.T., Trinh, N.B., Phan, K.L., Lin, C.W. 2019 Two new species, Begonia dinhdui and B. bacmeensis (Begoniaceae), from Vietnam. Phytotaxa 427(1): 22–30.
DOI: 10.11646/phytotaxa.427.1.3View Article
Google Scholar
Pham, V.T., Dinh, Q.D., Nguyen, V.C., Trinh, N.B., Nguyen, D.D., Nguyen, T.H., Lin, C.W. 2021 Begonia of Vietnam: an updated checklist, including a new species and a new record. Phytotaxa 507(2): 144–154.
DOI: 10.11646/phytotaxa.507.2.2View Article
Google Scholar
Shui, Y.M., Vu, C.T., Le, T.A., Pham, T.T.D., Nguyen, V.D., Duong, T.M.H., Lei, L.G. 2019 Two new cane-like species of Begonia L. (Begoniaceae) from central Vietnam. Phytotaxa 411(1): 57–64.
DOI: 10.11646/phytotaxa.411.1.5View Article
Google Scholar
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.
DOI: 10.14258/turczaninowia.24.2.12View Article
Google Scholar
Tian, D.K., Hoang, T.S., Wang, W.G., Chen, B. 2025 Six new species of Begonia from northern Vietnam. Taiwania 70(2): 320?330.
DOI: 10.6165/tai.2025.70.320View Article
Google Scholar
Wu, C.Y., Ku., T.C. 1995 New taxa of the Begonia L. (Begoniaceae) from China. Acta Phytotax. Sin. 33(3): 251–280.

