Abstract
A new species, Begonia dalaiensis (sect. Platycentrum) is described from Arunachal Pradesh, Northeast India. A morphological description along with a photographic plate, distribution map and conservation status is provided here. The phylogenetic relationship among the allied species of this section is also established here based on molecular evidence.
References
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Candolle, A.L.P.P. de. (1864) Begoniaceae. Prodromus Systematis Naturalis Regni Vegetabilis 15 (1): 266–408.
Chung, K.F., Leong, W.C., Rubite, R.R., Repin, R., Kiew, R., Liu, Y. & Peng, C.I. (2014) Phylogenetic analyses of Begonia sect. Coelocentrum and allied limestone species of China shed light on the evolution of Sino-Vietnamese karst flora. Botanical Studies 55 (1): 1–15. https://doi.org/10.1186/1999-3110-55-1
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Darriba, D., Taboada, G.L., Doallo, R. & Posada, D. (2012) jModelTest 2: more models, new heuristics and parallel computing. Nature Methods 9 (8): 772. https://dx.doi.org/10.1038/nmeth.2109
De Wilde, J.J.F.E., Hughes, M., Rodda, M., Thomas, D.C. (2011) Pliocene intercontinental dispersal from Africa to Southeast Asia highlighted by the new species Begonia afromigrata (Begoniaceae). Taxon 60 (6): 1685–1692.
Doorenbos, J., Sosef, M.S.M & de Wilde, J.J.F.E. (1998) The sections of Begonia including descriptions, keys and species lists (Studies in Begoniaceae VI) Wageningen Agricultural University Papers 98 (2): 1–266.
Forrest, L.L. & Hollingsworth, P.M. (2003) A recircumscription of Begonia based on nuclear ribosomal sequences. Plant Systematics and Evolution 241 (3): 193–211. https://doi.org/10.1007/s00606-002-0033-y
Gu, C., Peng, C. & Turland, N. (2007) Begoniaceae. In: Wu, Z. & Raven, P. (eds.) Flora of China. pp 153–207.
Gyeltshen, P., Hughes, M., Zangpo, P., Jamtsho, S., Phuntsho, T., Choden, T., La, C. & Wangchuk, T. (2022) One new species and four new records of Begonia (Begoniaceae) from Bhutan. Edinburgh Journal of Botany 79: 1–18. https://doi.org/10.24823/EJB.2022.1922
Hughes, M. (2008) An Annotated Checklist of Southeast Asian Begonia. Edinburgh: Royal Botanic Garden Edinburgh.
Hughes, M., Moonlight, P.W., Jara-Muñoz, A., Tebbitt, M.C., Wilson, H.P., Zhong, K. & Pullan, M. (2015–) Begonia Resource Centre. Available from: http://padme. rbge.org.uk/begonia/ (accessed 24 August 2022).
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Ningrum, W.D.A., Atmaja, M.B., Daryono, B.S. & Purnomo, P. (2020) Genetic variability of Begonia longifolia Blume from Indonesia based on Nuclear DNA internal transcribed spacer (ITS) sequence data. Biodiversitas Journal of Biological Diversity 21 (12): 5778–5785.
Rajbhandary, S. & Shrestha, K.K. (2010) Taxonomic and Ecological significance of seed micromorphology in Himalayan Begonias: SEM analysis. Pakistan Journal Botany 42: 135–154.
Rajbhandary, S., Hughes, M., Phutthai, T., Thomas, D.C. & Shrestha, K.K. (2011) Asian Begonia: out of Africa via the Himalayas. Gard Bull Singapore 63 (1–2): 277–286.
Taram, M., Wahlsteen, E. & Borah, D. (2022) Begonia markiana (Begoniaceae), a new species from Lower Dibang Valley of Arunachal Pradesh, Northeast India. Taiwania 67 (2): 165–170.
Tebbitt, M.C. (2003) Taxonomy of Begonia longifolia Blume (Begoniaceae) and related species. Brittonia 55: 19–29. https://doi.org/10.1663/0007-196X(2003)055[0019:TOBLBB]2.0.CO;2
Tebbitt MC, Lowe-Forrest L, Santoriello A, Clement WL, Swensen SM (2006) Phylogenetic relationships of Asian Begonia, with an emphasis on the evolution of rain-ballist and animal dispersal mechanisms in sections Platycentrum, Sphenanthera and Leprosae. Systematic Botany 31: 327–336. https://doi.org/10.1600/036364406777585784
Thomas, D.C., Hughes, M., Phutthai, T., Rajbhandary, S., Rubite, R.R., Ardi, W.H. & Richardson, J.E. (2011) A non-coding plastid DNA phylogeny of Asian Begonia (Begoniaceae): Evidence for morphological homoplasy and sectional polyphyly. Molecular Phylogenetic and Evolution 60: 428–444. https://doi.org/10.1016/j.ympev.2011.05.006
Tian, D.K., Li, C., Li, C.H. & Li, X.J. (2015) Begonia pulchrifolia (sect. Platycentrum), a new species of Begoniaceae from Sichuan of China. Phytotaxa 207 (3): 242–252. https://dx.doi.org/10.11646/phytotaxa.207.3.2
Tian, D.K., Wang, W.G., Dong, L.N., Xiao, Y., Zheng, M.M. & Ge, B.J. (2021) A new species (Begonia giganticaulis) of Begoniaceae from southern Xizang (Tibet) of China. PhytoKeys 187: 189–205. https://doi.org/10.3897/phytokeys.187.75854
Tong, Y., Tian, D.K., Shu, J.P., Xiao, Y., Wang, B.M. & Fu, N.F. (2019) Begonia yizhouensis, a new species in Begonia sect. Coelocentrum (Begoniaceae) from Guangxi, China. Phytotaxa 407 (1): 59–70. https://doi.org/10.11646/phytotaxa.407.1.9
Tseng, Y.H., Kim, Y.D., Peng, C.I., Htwe, K.M., Cho, S.H., Kono, Y. & Chung, K.F. (2017) Begonia myanmarica (Begoniaceae), a new species from Myanmar, and molecular phylogenetics of Begonia sect. Monopteron. Botanical Studies 58 (1): 1–9. https://doi.org/10.1186/s40529-017-0175-9
Uddin, A. (2010) Revision of Family Begoniaceae for India. Ph.D thesis submitted to Gauhati University, India.
Blume, C.L. (1827) Enumeratio Plantarum Javae et insularum adjacentium minus cognitarum vel novarum ex herbariis Reinwardtii, Kuhlii, Hasseltii et Blumii curavit Carol. Ludov. Blume. Apud J.W. van Leeuwen, Lugduni Batavorum [Leiden]. https://doi.org/10.5962/bhl.title.44901
Camfield, R. & Hughes, M. (2018) A revision and one new species of Begonia L. (Begoniaceae, Cucurbitales) in Northeast India. European Journal of Taxonomy 396: 1–116. https://doi.org/10.5852/ejt.2018.396
Candolle, A.L.P.P. de. (1864) Begoniaceae. Prodromus Systematis Naturalis Regni Vegetabilis 15 (1): 266–408.
Chung, K.F., Leong, W.C., Rubite, R.R., Repin, R., Kiew, R., Liu, Y. & Peng, C.I. (2014) Phylogenetic analyses of Begonia sect. Coelocentrum and allied limestone species of China shed light on the evolution of Sino-Vietnamese karst flora. Botanical Studies 55 (1): 1–15. https://doi.org/10.1186/1999-3110-55-1
Craib, W.G (1912) Contributions to the Flora of Siam. Bulletin of Miscellaneous Information 15: 153–154. https://doi.org/10.5962/bhl.title.29757
Darriba, D., Taboada, G.L., Doallo, R. & Posada, D. (2012) jModelTest 2: more models, new heuristics and parallel computing. Nature Methods 9 (8): 772. https://dx.doi.org/10.1038/nmeth.2109
De Wilde, J.J.F.E., Hughes, M., Rodda, M., Thomas, D.C. (2011) Pliocene intercontinental dispersal from Africa to Southeast Asia highlighted by the new species Begonia afromigrata (Begoniaceae). Taxon 60 (6): 1685–1692.
Doorenbos, J., Sosef, M.S.M & de Wilde, J.J.F.E. (1998) The sections of Begonia including descriptions, keys and species lists (Studies in Begoniaceae VI) Wageningen Agricultural University Papers 98 (2): 1–266.
Forrest, L.L. & Hollingsworth, P.M. (2003) A recircumscription of Begonia based on nuclear ribosomal sequences. Plant Systematics and Evolution 241 (3): 193–211. https://doi.org/10.1007/s00606-002-0033-y
Gu, C., Peng, C. & Turland, N. (2007) Begoniaceae. In: Wu, Z. & Raven, P. (eds.) Flora of China. pp 153–207.
Gyeltshen, P., Hughes, M., Zangpo, P., Jamtsho, S., Phuntsho, T., Choden, T., La, C. & Wangchuk, T. (2022) One new species and four new records of Begonia (Begoniaceae) from Bhutan. Edinburgh Journal of Botany 79: 1–18. https://doi.org/10.24823/EJB.2022.1922
Hughes, M. (2008) An Annotated Checklist of Southeast Asian Begonia. Edinburgh: Royal Botanic Garden Edinburgh.
Hughes, M., Moonlight, P.W., Jara-Muñoz, A., Tebbitt, M.C., Wilson, H.P., Zhong, K. & Pullan, M. (2015–) Begonia Resource Centre. Available from: http://padme. rbge.org.uk/begonia/ (accessed 24 August 2022).
Irmcher, E. (1925) Begoniaceae. In: Engler, A. & Prantl, K. (eds.) Die Naturlichen Pflanzenfamilien, 2nd ed. Engelmann, Leipzig. Wilhelm Engelmann. pp. 548–588.
IUCN Standards and Petitions Committee. (2022) Guidelines for Using the IUCN Red List Categories and Criteria. Version 15.1. Prepared by the Standards and Petitions Committee. [https://www.iucnredlist.org/documents/RedListGuidelines.pdf]
Moonlight, P.M., Ardi, W.H., Padilla, L.A., Chung, K.F., Fuller, D., Girmansyah, D., Hollands, R., Jara-Munoz, A., Kiew, R., Leong, W.C., Liu, Y., Mahardika, A., Marasinghe, L.D., O’Connor, M., Peng, C.I., Perez, A.J., Phutthai, T., Pullan, M., Rajbhandary, S., Reynel, C., Rubite, R.R., Sang, J., 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 (2): 267–323. https://doi.org/10.12705/672.3
Ningrum, W.D.A., Atmaja, M.B., Daryono, B.S. & Purnomo, P. (2020) Genetic variability of Begonia longifolia Blume from Indonesia based on Nuclear DNA internal transcribed spacer (ITS) sequence data. Biodiversitas Journal of Biological Diversity 21 (12): 5778–5785.
Rajbhandary, S. & Shrestha, K.K. (2010) Taxonomic and Ecological significance of seed micromorphology in Himalayan Begonias: SEM analysis. Pakistan Journal Botany 42: 135–154.
Rajbhandary, S., Hughes, M., Phutthai, T., Thomas, D.C. & Shrestha, K.K. (2011) Asian Begonia: out of Africa via the Himalayas. Gard Bull Singapore 63 (1–2): 277–286.
Taram, M., Wahlsteen, E. & Borah, D. (2022) Begonia markiana (Begoniaceae), a new species from Lower Dibang Valley of Arunachal Pradesh, Northeast India. Taiwania 67 (2): 165–170.
Tebbitt, M.C. (2003) Taxonomy of Begonia longifolia Blume (Begoniaceae) and related species. Brittonia 55: 19–29. https://doi.org/10.1663/0007-196X(2003)055[0019:TOBLBB]2.0.CO;2
Tebbitt MC, Lowe-Forrest L, Santoriello A, Clement WL, Swensen SM (2006) Phylogenetic relationships of Asian Begonia, with an emphasis on the evolution of rain-ballist and animal dispersal mechanisms in sections Platycentrum, Sphenanthera and Leprosae. Systematic Botany 31: 327–336. https://doi.org/10.1600/036364406777585784
Thomas, D.C., Hughes, M., Phutthai, T., Rajbhandary, S., Rubite, R.R., Ardi, W.H. & Richardson, J.E. (2011) A non-coding plastid DNA phylogeny of Asian Begonia (Begoniaceae): Evidence for morphological homoplasy and sectional polyphyly. Molecular Phylogenetic and Evolution 60: 428–444. https://doi.org/10.1016/j.ympev.2011.05.006
Tian, D.K., Li, C., Li, C.H. & Li, X.J. (2015) Begonia pulchrifolia (sect. Platycentrum), a new species of Begoniaceae from Sichuan of China. Phytotaxa 207 (3): 242–252. https://dx.doi.org/10.11646/phytotaxa.207.3.2
Tian, D.K., Wang, W.G., Dong, L.N., Xiao, Y., Zheng, M.M. & Ge, B.J. (2021) A new species (Begonia giganticaulis) of Begoniaceae from southern Xizang (Tibet) of China. PhytoKeys 187: 189–205. https://doi.org/10.3897/phytokeys.187.75854
Tong, Y., Tian, D.K., Shu, J.P., Xiao, Y., Wang, B.M. & Fu, N.F. (2019) Begonia yizhouensis, a new species in Begonia sect. Coelocentrum (Begoniaceae) from Guangxi, China. Phytotaxa 407 (1): 59–70. https://doi.org/10.11646/phytotaxa.407.1.9
Tseng, Y.H., Kim, Y.D., Peng, C.I., Htwe, K.M., Cho, S.H., Kono, Y. & Chung, K.F. (2017) Begonia myanmarica (Begoniaceae), a new species from Myanmar, and molecular phylogenetics of Begonia sect. Monopteron. Botanical Studies 58 (1): 1–9. https://doi.org/10.1186/s40529-017-0175-9
Uddin, A. (2010) Revision of Family Begoniaceae for India. Ph.D thesis submitted to Gauhati University, India.