Abstract
A new species Impatiens chakhesangiana sp. nov., is described and illustrated from Porba village, Phek district, Nagaland, Northeast India. It is similar to Impatiens drepanophora but, differs in multiple characters like perennial habit, stem, petiole, spur, dorsal petal, basal lobe and capsule. A distribution map is also provided.
References
- Bhaskar, V. (2012) Taxonomic monograph on Impatiens L. (Balsaminaceae) of the Western Ghats, South India: The key genus for endemism. Centre for Plant Taxonomic Studies, Calicut, 560 pp.
- Borah, D., Singh, R.K. & Taram, M. (2022) Impatiens pasighatensis (Balsaminaceae), A New Species from Arunachal Pradesh, Northeast India. Indian Forester 148 (2): 233–235. https://doi.org/10.36808/if/2022/v148i2/156569
- Chowlu, K., Shenoy, A., Ray, A., Kabeer, A.A. & Borah, S. (2025) Impatiens rajibiana (Balsaminaceae): a new species from Arunachal Pradesh, India. Nelumbo 67 (1): 10–16. https://doi.org/10.20324/nelumbo/v67/2025/173506
- Fischer, C.E.C. (1926) Impatiens parkinsonii. Bulletin of Miscellaneous Information (Royal Gardens, Kew) 1926: 467. https://doi.org/10.2307/4114288
- Fischer, E. (2004) Balsaminaceae. In: Kubitzki, K. (Ed.) The families and genera of vascular plants, Vol. 6. Springer, Berlin, pp. 20–25. https://doi.org/10.1007/978-3-662-07257-8_4
- Gogoi, R. & Borah, S. (2015) Impatiens ashihoi, a new species of Balsaminaceae from Dibang Valley of Arunachal Pradesh, India. Phytotaxa 238: 278–282. https://doi.org/10.11646/phytotaxa.238.3.7
- Gogoi, R. (2019) Contribution to the taxonomy of Impatiens in Northeast India. Rheedea 29 (1): 1–12.
- Gogoi, R., Upadhyay, A.K. & Rathakrishnan, N.C. (2020) Flowering plants of India. Botanical Survey of India, Kolkata, 706 pp.
- Grey-Wilson, C. (1980) Impatiens of Africa. A.A Balkema, Rotterdam, 235 pp.
- Grey-Wilson, C. (1989) The Impatiens bicornuta and its allies: Studies in Balsaminaceae VII. Kew Bulletin 44: 61–66. https://doi.org/10.2307/4114645
- Hareesh, V.S. & Mamiyil Sabu, M.S. (2017) Impatiens nilalohitae (Balsaminaceae): a new species from Northeastern India. Phytotaxa 323 (2): 189–193. https://doi.org/10.11646/phytotaxa.323.2.7
- Hareesh, V.S., Gogoi, R. & Sabu, M. (2016) Impatiens pseudocitrina (Balsaminaceae), a new species from Arunachal Pradesh, northeast India. Phytotaxa 282 (3): 231–234. https://doi.org/10.11646/phytotaxa.282.3.8
- Hooker, J.D. (1875) Impatiens L. In: Hooker, J.D. (Ed.) The flora of British India, Vol. 1. L. Reeve & Co., London, pp. 440–464. https://doi.org/10.5962/bhl.title.54393
- Hooker, J.D. (1908) Impatiens. In: Hooker, J.D. (Ed.) Hooker’s Icones Plantarum, 4th ser., Vol. 9. Dulau & Co., London, pp. 1851–2857.
- Huang, S.H., Shui, Y.M. & Chen, W.H. (2003) New taxa of Impatiens (Balsaminaceae) from Yunnan. Acta Botanica Yunnanica 25: 61–268.
- Jain, S.K. & Rao, R.R. (1976) A handbook of field and herbarium methods. Today & Tomorrow’s Printers and Publishers, New Delhi, 157 pp.
- Janssens, S.B., Knox, E.B., Huysmans, S., Smets, E.F. & Merckx, V.S.F.T. (2009) Rapid radiation of Impatiens (Balsaminaceae) during Pliocene and Pleistocene: result of a global climate change. Molecular Phylogenetics and Evolution 52 (3): 806–824. https://doi.org/10.1016/j.ympev.2009.04.013
- Linnaeus, C. (1753) Impatiens. In: Linnaeus, C. (Ed.) Species Plantarum, Vol. 2. Laurentius Salvius, Stockholm, pp. 937.
- Mabberley, D.J. (2008) The plant book: A portable dictionary of the vascular plants (3rd ed.). Cambridge University Press, Cambridge, 1021 pp.
- Moa, Moaakum, Dey, Santanu, Adamowski, Wojciech & Gogoi, Rajib. (2017) Impatiens nagorum sp. nov. (Balsaminaceae) a new species from Nagaland, Northeast India. Phytotaxa 308 (2): 275–282 https://doi.org/10.11646/phytotaxa.308.2.9
- Odyuo, N., Deori, C. & Gogoi, R. (2015) Rediscovery of Impatiens khasiana Hook. f. after more than a century. Telopea 18: 85–89. https://doi.org/10.7751/telopea8505
- POWO (2025) Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Available from: https://powo.science.kew.org/ (accessed 28 October 2025)
- Tiwari, U.L. (2023) Impatiens tajoensis (Balsaminaceae): A new species from Arunachal Pradesh, India. Taiwania 68 (1): 39–43.
- Toppin, S.M. (1920) Notes on the balsams of Chitral and the Kachin Hills. Bulletin of Miscellaneous Information (Royal Botanic Gardens, Kew) 1920: 345–367. https://doi.org/10.2307/4118598
- Vivekananthan, K., Rathakrishnan, N.C., Swaminathan, M.S. & Ghara, L.K. (1997) Balsaminaceae. In: Hajra, P.K., Nair, V.J. & Daniel, P. (Eds.) Flora of India, Vol. 4. Botanical Survey of India, Calcutta, pp. 99–229.
- Wight, R. & Arnott, G.A.W. (1836) Impatiens cuspidata. Companion to the Botanical Magazine, London, pp. 321.
- Yu, S.X. (2012) Balsaminaceae of China. Peking University Press, Beijing, China, 215 pp.
