2022 vol.67 no.2

Research Paper

A new species of Isodon (Lamiaceae) from Indian Eastern Himalaya

Vinay Ranjan, Gopal Krishna,, Anant Kumar

Published on: 01 May 2022

Page: 260 - 266

DOI: 10.6165/tai.2022.67.260

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2022 vol.67 no.2 pp.260-266



Isodon neorensis, a new species from Eastern Himalaya of India has been described and illustrated here based on its morphology. A weak, short lived herbaceous species was collected from Neora Valley National Park, Darjeeling, India. Inflorescence, dark red colour flower, calyx without septate-villose hairs at base, stamens glabrous at base, and not exserted filaments are some important diagnostic features besides substantial morphological differences with allied species. The identification key to Indian Eastern Himalayan species of Isodon, distribution map, photo plate, illustration is also provided.

Keyword: Darjeeling, Eastern Himalaya, India, Isodon atroruber, I. neorensis, I. lophanthoides, Neora Valley National Park



Anonymous. 2020. Flowering Plants of India-An Annotated Checklist (Dicotyledons). Botanical Survey of India, India. 2: 246.

Bentham, G. 1832-1836. Labiatarum Genera et Species. London, Ridgeway & Sons.

Bentham, G. 1876. Labiatae. In: Bentham G. and J.D. Hooker (eds.), Genera Plantarum vol. 2:1160–1223, Lovell Reeve & Co. London

Chen, Y.P. and C.L. Xiang. 2019. Taxonomic notes on Isodon (Lamiaceae) in China, III: resurrection of I. brachythyrsus, I. chionanthus and I. kangtingensis. Nord. J. Bot. 37(7): e02240.
DOI: 10.1111/njb.02240View Article Google Scholar

Chen, Y.P., G.X. Hu and C.L. Xiang. 2014a. Isodon delavayi (Ocimeae, Nepetoideae, Lamiaceae): a new species from Yunnan province, Southern China. Phytotaxa 156(5):291–297.
DOI: 10.11646/phytotaxa.156.5.5View Article Google Scholar

Chen, Y.P., G.X. Hu and C.L. Xiang. 2014b. Isodon atroruber (Lamiaceae): A newly recorded species from China. Plant Sci. J. 32: 329–335.

Chen, Y.P., C.L. Xiang, G.X. Hu and H. Peng. 2017. Taxonomic notes on Isodon (Nepetoideae, Lamiaceae) in China I: revision of four species. Nord. J. Bot. 35(2):162–175.
DOI: 10.1111/njb.01282View Article Google Scholar

Chen, Y. P., G.X. Hu, F. Zhao, H. Peng and C.L. Xiang. 2017. Taxonomic Notes on Isodon (Lamiaceae) in China, II: I. aurantiacus, a new species from Tibet, China. Ann. Bot. Fennici 54(4–6): 239–243.
DOI: 10.5735/085.054.0606View Article Google Scholar

Chen, Y.P., T.C. Wilson, Y.D. Zhou, Z.H. Wang, E.D. Liu, H. Peng and C.L. Xiang. 2019. Isodon hsiwenii (Lamiaceae: Nepetoideae), a new species from Yunnan, China. Syst. Bot. 44(4): 913–922.
DOI: 10.1600/036364419X15710776741486View Article Google Scholar

Chen, Y. P., C.Z. Huang, Y. Zhao and C.L. Xiang. 2021. Molecular and morphological evidence for a new species of Isodon (Lamiaceae) from southern China. Plant Divers. 43(1):54–62.
DOI: 10.1016/j.pld.2020.06.004View Article Google Scholar

Clement, R.A. 1993. Notes relating to the Flora of Bhutan: XVIII, New taxa and new combination in Labiatae. Edinburgh J. Bot. 50(1):33–38.
DOI: 10.1017/S0960428600000639View Article Google Scholar

Clement, R.A. 1999. Labiatae. In: Long, D. G. (ed.), Flora of Bhutan, 2(2):938–1002, Royal Botanic Garden, Edinburgh.

Dutt, H. C., N. Bhagat and S. Pandit. 2015. Oral traditional knowledge on medicinal plants in jeopardy among Gaddi shepherds in hills of north-western Himalaya, J & K, India. J. Ethnopharmacol. 168: 337–348.
DOI: 10.1016/j.jep.2015.03.076View Article Google Scholar

Farr, E.R., J.A. Leussink and F.A. Stafleu. 1979. Index Nominum Genericorum (Plantarum), vol. 2. Utrecht: Bohn, Scheltema and Holkema.

Hara, H. 1971. Flora of Eastern Himalaya. Second Report. Univ. Mus. Univ. Tokyo Bull. 2: 1–393.

Harley, R.M, A.J. Paton and O. Ryding. 2004a. New synonyms and taxonomic changes in the Labiatae. Kew Bull. 58(2):485–489.
DOI: 10.2307/4120633View Article Google Scholar

Harley, R.M., S. Atkins, A.L. Budantsev, P.D. Cantino, B.J. Conn, R. Grayer, M.M. Harley, R. De-Kok, T. Krestovskaja, R. Morales, A.J. Paton, O. Ryding and T. Upson 2004b. Labiatae. In: Kubitzki, K. and J. W. Kadereit. (eds.), The Families and Genera of Vascular Plants. 7:167–275. Berlin: Springer
DOI: 10.1007/978-3-642-18617-2_11View Article Google Scholar

Hooker, J.D. 1885. Labiatae. In: Hooker, J.D. (ed), Flora of British India, vol. 4:604–705. London, Lovell Reeve & Co.

Khan, Z.S., A.A. Khuroo and G.H. Dar. 2004. Ethnomedicinal survey of Uri, Kashmir Himalaya. Indian J. Trad. Knowl. 3(4):351–357.

Khomdram, S.D., Y.N. Devi and P.K. Singh. 2011. Ethnobotanical uses of Lamiaceae in Manipur, India. Ethnobotany 23: 57–63.

Kudo, Y. 1929. Labiatarum sino-japonicarum prodromus. Memoirs of the Faculty of Science and Agriculture, Taihoku Imperial University 1–2: 37–332.

Kumar, K., Y.P. Sharma, R.K. Manhas and H. Bhatia. 2015. Ethnomedicinal plants of Shankaracharya hill, Srinagar, J & K, India. J. Ethnopharmacol. 170: 255–274.
DOI: 10.1016/j.jep.2015.05.021View Article Google Scholar

Li, H.W. 1988. Taxonomic review of Isodon (Labiatae). J. Arnold Arbor. 69(4): 289–400.
DOI: 10.5962/p.324759View Article Google Scholar

Li, H.W. and I.C. Hedge. 1994. Lamiaceae. In: Wu, C.Y. and P.H. Raven (eds), Flora of China, vol. 17: 269–291. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis.

Mabberley, J.D. 2017. Mabberley’s plant-book. A portable dictionary of plants, their classification and uses, 4thed.- Cambridge University Press.

Maki, M., T. Yamashiro, I. Dohzono and K. Suzuki. 2010. Molecular Phylogeny of Isodon (Lamiaceae) in Japan using Chloroplast DNA sequences: recent rapid radiations or ancient introgressive hybridization? Plant Species Biol. 25(3): 240–248.
DOI: 10.1111/j.1442-1984.2010.00290.xView Article Google Scholar

Mukerjee, S.K. 1940. A revision of the Labiatae of the Indian Empire. Rec. Bot. Surv. India 14(1): 1–228.

Naveen, V.V.K., M.K.R. Narayanan, C.N. Sunil, M.G. Sanilkumar and E.C. Baiju. 2016. Isodon purpurescence (Lamiaceae), a new species from Western Ghats, Kerala, India. Taiwania 61(1): 13?15.
DOI: 10.6165/tai.2016.61.13View Article Google Scholar

Ningthoujam, S.S., A.D. Talukdar, K.S. Potsangbam and M.D. Choudhury. 2013. Traditional uses of herbal vapour therapy in Manipur, North East India: An ethnobotanical survey. J. Ethnopharmacol. 147(1): 136–147.
DOI: 10.1016/j.jep.2012.12.056View Article Google Scholar

Paton, A.J. and O. Ryding. 1998. Hanceola, Siphocranion and Isodon and their position in the Ocimeae (Labiatae). Kew Bull. 53(3): 723–731.
DOI: 10.2307/4110492View Article Google Scholar

Paton, A.J., D. Springate, S. Suddee, D. Otieno, R.J. Grayer, M.M. Harley, F. Willis, M.S.J. Simmonds, M.P. Powell, V. Savolainen. 2004. Phylogeny and evolution of basils and allies (Ocimeae, Labiatae) based on three plastid DNA regions. Mol. Phylogene Evol. 31(1): 277–299.
DOI: 10.1016/j.ympev.2003.08.002View Article Google Scholar

Sasidharan, N. 2013. Flowering Plants of Kerala: CD ROM ver. 2.0. Kerala Forest Research Institute, Peechi, Kerala, India.

Singh, H.B. and T.B. Singh. 2005. Plants used for making traditional rosaries in Manipur. Indian J. Trad. Knowl. 4(1): 15–20.

Singh, J., A. Rajasekaran and K.D. Sharma. 2008. Traditional ethnobotanical knowledge of Kiran Pargana, Shimla district, Himachal Pradesh. J. Econ. Taxon. Bot. 32: 253–263.

Singh, V. and N.S. Chauhan. 2005. Traditional practices of herbal medicines in the Lahaul valleys, Himachal Himalayas. Indian J. Trad. Knowl. 4(2): 208–220.

Suddee, S, A.J. Paton and J.A.N. Parnell. 2004. A taxonomic revision of tribe Ocimeae Dumort. (Lamiaceae) in continental South East Asia I. Introduction, Hyptidinae & Hanceolinae. Kew Bull. 59(3): 337–378.
DOI: 10.2307/4110949View Article Google Scholar

Xiang, C.L. and E.D. Liu. 2012. A new species of Isodon (Lamiaceae: Nepetoideae) from Yunnan province, southwest China. Syst. Bot. 37(3): 811–817.
DOI: 10.1600/036364412X648751View Article Google Scholar

Yu, X.Q., M. Maki, B.T. Drew, A.J. Paton, H.W. Li, J.L. Zhao, J. G. Conran and J. Li. 2014. Phylogeny and historical biogeography of Isodon (Lamiaceae): Rapid radiation in south-west China and Miocene overland dispersal into Africa. Mol. Phylogene. Evol. 77: 183–194.
DOI: 10.1016/j.ympev.2014.04.017View Article Google Scholar

Zhong, J.S., J. Li, L. Li, J.H. Conran and H.W. Li. 2010. Phylogeny of Isodon (Schrad. ex Benth.) Spach (Lamiaceae) and Related Genera Inferred from Nuclear Ribosomal ITS, trnL–trnF Region, and rps16 Intron Sequences and Morphology. Syst. Bot. 35(1): 207–219.
DOI: 10.1600/036364410790862614View Article Google Scholar