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The genus Gymnostachyum Nees, belongs to family Acanthaceae, comprises about 52 species (www.
plantsoftheworldonline.org), distributed mainly in tropical Asia (www.efloras.org). In India, 11 species
and four varieties have been recorded to date from various geographical regions (Karthikeyan et al. 2009);
of which, 12 taxa are recorded so far from peninsular India (Gamble 1924; Prabhukumar et al. 2015). As
part of the ongoing taxonomic revision in the genus Gymnostachyum in India, the need for lectotypification
of two names was identified, viz., G. glabrum (Dalzell) T. Anderson (1850: 338, 1867: 506) and G. glabrum
var. denticulatum C.B. Clarke (1885: 509). Clarke (1885) delineates var. denticulatum from latter by its distinctly toothed and glabrous nature of lamina. The lectotypes are designated here according to ICN Shenzhen Code Art. 9.3 (Turland et al. 2018).
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Anderson, T. (1867). An enumeration of the Indian species of Acanthaceae. Botanical Journal of Linnean Society 7: 425â€“526.
Clarke, C.B. (1885). Acanthaceae, pp. 387â€“558. In: Hooker, J.D. (ed.) The Flora of British India - 4. Reeve & Co., Ltd., London.
Dalzell, N.A. (1850). Contributions to the Botany of western India. Hookerâ€™s Journal of Botany and Kew Garden Miscellany 2: 336â€“344.
Karthikeyan, S., M.Sanjappa & S.Moorthy (2009). Flowering Plants of India - Dicotyledons, Volume 1 (Acanthaceae â€“ Avicenniaceae). Botanical Survey of India, Kolkata, 365pp.
Turland, N.J., J.H. Wiersema, F.R. Barrie, W. Greuter, D.L. Hawksworth, P.S. Herendeen, S. Knapp, W.-H. Kusber, D.-Z. Li, K. Marhold, T.W. May, J. McNeill, A.M. Monro, J. Prado, M.J. Price & G.F. Smith (eds.) (2018). International Code of Nomenclature for Algae, Fungi, and Plants (Shenzhen Code) Adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. Regnum Vegetabile 159. Koeltz Botanical Books, GlashÃ¼tten: https://doi.org/10.12705/Code.2018
Prabhukumar, K.M., B. Indira, V.B. Sreekumar, K.S. Ramya, S. George, K.J. Dantas & A.D. Suma (2015). Gymnostachyum warrieranum (Acanthaceae), a new species from Western Ghats of India with morphological and molecular data. Kew Bulletin 70(3): 1â€“9; https://doi.org/10.1007/s12225-015-9590-9
www.efloras.org (accessed on 14 April 2018)
www.plantsoftheworldonline.org (accessed on 14 December 2018)