Abstract
A new species of Begonia (sect. Reichenheimia, Begoniaceae) from Kerala, SW India, B. rajvikramanii, is described here based on critical morphological characters. A detailed taxonomic description, photographic plate, notes on ecology, and a comparative table distinguishing it from closely allied species are provided.
References
- Aitawade, M.M., Bachulkar, M.Y. & Yadav, S.R. (2019a) Begonia handibadaganathensis (Begoniaceae), a new species from Western Ghats, India. Phytotaxa 423 (3): 206–210. https://doi.org/10.11646/phytotaxa.423.3.9
- Aitawade, M.M., Kattukunnel, J.J. & Yadav, S.R. (2019b) Begonia bachulkarii (Begoniaceae, sect. Reichenheimia), a new species from the southern Western Ghats with notes on sect. Reichenheimia in India. Phytotaxa 423 (5): 277–283. https://doi.org/10.11646/phytotaxa.423.5.1
- de Candolle, A.P. (1864) Begoniaceae. Prodromus Systematis Naturalis Regni Vegetabilis 15 (1): 266–408.
- Doorenbos, J., Sosef, M.S.M. & de Wilde, J.J.F.E. (1998) The Sections of Begonia, including descriptions, key and species lists (Studies in Begoniaceae VI). Wageningen Agricultural University Papers, Wageningen.
- Dryander, J.C. (1791) Observations on the genus Begonia. Transaction of the Linnean Society of London 1: 155–173. https://doi.org/10.1111/j.1096-3642.1791.tb00396.x
- Hughes, M., Moonlight, P.W., Jara-Muñoz, A., Tebbitt, M.C., Wilson, H.P., Zhong, K., Mills, T. & Pullan, M. (2015–present) Begonia Resource Centre. Available from: http://padme.rbge.org.uk/begonia/ (accessed 21 September 2026)
- IUCN (2024) Guidelines for Using the IUCN Red List Categories and Criteria, version 16. Prepared by the Standards and Petitions Committee. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 7 January 2026)
- Krishna, N., Britto, S.J., Thomas, S., Mani, B., Pradeep, A.K. & Jithin, K.V. (2019) A new section (Begonia sect. Flocciferae sect. nov.) and two new species in Begoniaceae from the Western Ghats of India. Edinburgh Journal of Botany 77 (2): 251–268. https://doi.org/10.1017/S0960428619000349
- Krishna, N. & Pradeep, A.K. (2020) Synonymy of Begonia keralensis with Begonia bachulkarii. Edinburgh Journal of Botany 77 (2): 269–269. https://doi.org/10.1017/S0960428619000386
- Lindau, G. (1893) Beiträge zur Systematik der Acanthaceen. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 18: 36–64. [https://www.biodiversitylibrary.org/item/676#page/43/mode/1up]
- Linnaeus, C. (1753) Species Plantarum. Laurentius Salvius, Stockholm, 1200 pp.
- Miquel, F.A.W. (1852) Analecta Botanica Indica, vol. 3. J.C.A. Sulpke, Amsterdam, 30 pp.
- Moonlight, P.W., Ardi, W.H., Arroyo Padilla, L., Chung, K.F., Fuller, D., Girmansyah, D., Hollands, R., Jara-Muñoz, A., Kiew, R., Mahardika, A., Marasinghe, L.D.K., Leong, W.-C., Liu, Y., O’Connor, M., Peng, C.-I, Pérez, Á.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
- Moonlight, P.W., Baldaszti, L., Cardoso, D., Elliott, A., Särkinen, T. & Knapp, S. (2024) Twenty years of big plant genera. Proceedings of the Royal Society B 291: 20240702. https://doi.org/10.1098/rspb.2024.0702
- Nayar, T.S., Rasiya, B.A. & Sibi, M. (2014) Flowering Plants of the Western Ghats, India 1. Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Thiruvananthapuram, 933 pp.
- Nayar, T.S., Beegam, A.R., Mohanan, N. & Rajkumar, G. (2006) Flowering Plants of Kerala―A Handbook. TBGRI, Thiruvananthapuram, Kerala, 1069 pp.
- Thiers, B. (2020 [continuously updated]) Index Herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual herbarium. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 22 December 2025)