Abstract
Based on morphological and phylogenetic studies, Selaginella qingchengshanensis, a new species in S. sect. Heterostachys from Sichuan, China is described and illustrated. Morphologically, the new species is similar to S. amblyphylla, but has sterile leaves with denticulate to slightly ciliate margins, dorsal leaves with long arista (as long as leaves) perpendicular to stems and branches in living plants, and axillary leaves triangular-ovate or broadly ovate. Molecular analyses based on ITS+5.8S and rbcL data also support it as a distinct species.
References
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<p>Baker, J.G. (1883) A synopsis of the genus <em>Selaginella</em>. <em>Journal of Botany</em> 21: 1–5, 42–46, 80–84, 97–100, 141–145, 210–213, 240–244.</p>
<p>Darriba, D., Taboada, G.L., Doallo, R. & Posada, D. (2012) jModelTest 2: more models, new heuristics and parallel computing.<em> Nature Methods </em>9: 772–772. https: //doi.org/10.1371/journal.pone.0015136</p>
<p>Ebihara, A., Nitta, J.H. & Ito, M. (2010) Molecular species identification with rich floristic sampling: DNA barcoding the pteridophyte flora of Japan. <em>PLoS One</em> 5: e15136. https://doi.org/10.1371/journal.pone.0015136</p>
<p>Greville, R.K. & Hooker, W.J. (1831) Enumeratio filicum. <em>Botanical Miscellany</em> 2: 360–400.</p>
<p>Hieronymus, G. & Sadebeck, R. (1902) Selaginellaceae. <em>In:</em> Engler, A. & Prantl, K. (eds) <em>Die natürlichen Pflanzenfamilien, I (4)</em>. Leipzig: Engelmann, pp. 621–716. http://dx.doi.org/10.5962/bhl.title.4635</p>
<p>IUCN (2017) The IUCN Red List of Threatened Species. Version 2017-1. Available at: www.iucnredlist.org (accessed 13 October 2021)</p>
<p>Palisot-Beauvois, A.M.F.J. (1804) Suite de l’Aethéogamie. <em>Magasin Encyclopédique </em>9: 472–483.</p>
<p>Shalimov, A.P., Zhu, Y.-M., Zhang, M.-H. & Zhang, X.-C. (2019) <em>Selaginella dianzhongensis</em> (Selaginellaceae), a new spikemoss from China. <em>PhytoKeys</em> 118: 75–87. https://doi.org/10.3897/phytokeys.118.30375</p>
<p>Thiers, B. (2018) <em>Index Herbariorum</em>: <em>A global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium</em>. Available from: http: //sweetgum.nybg.org/science/ih/ (accessed 26 November 2018)</p>
<p>Warburg, O. (1900) <em>Monsunia</em>, vol. 1. Leipzig: Engelmann. [https://archive.org/details/bub_gb_1SsWAAAAYAAJ]</p>
<p>Weststrand, S. & Korall, P. (2016a) A subgeneric classification of <em>Selaginella</em> (Selaginellaceae). <em>American Journal of Botany</em> 103: 2160–2169. https://doi.org/10.3732/ajb.1600288</p>
<p>Weststrand, S. & Korall, P. (2016b) Phylogeny of Selaginellaceae: There is value in morphology after all! <em>American Journal of Botany </em>103: 2136–2159. https://doi.org/10.3732/ajb.1600156</p>
<p>Ye, Z.-Y., Lu, N.T., Zhang, L., Zhou, X.-M. & Zhang, L.-B. (2020) <em>Selaginella coriaceifolia</em> (sect. <em>Heterostachys</em>; Selaginellaceae), a new lycophyte species from central Vietnam. <em>Phytotaxa</em> 453: 121–129. https://doi.org/10.11646/phytotaxa.453.2.3</p>
<p>Zhang, X.-C., Shalimov, A.P., Kang, J.-S. & Zhang, M.-H. (2020) <em>Selaginella subvaginata</em> (Selaginellaceae), a new spikemoss from China. <em>Journal of Species Research</em> 9: 221–232. https://doi.org/10.12651/JSR.2020.9.3.221</p>
<p>Zhou, X.-M., Rothfels, C.J., Zhang, L., He, Z.-R., Le Péchon, T., He, H., Lu, N.T., Knapp R., Lorence, D., He, X.-J., Gao, X.-F. & Zhang, L.-B. (2016) A large-scale phylogeny of the lycophyte genus <em>Selaginella</em> (Selaginellaceae: Lycopodiopsida) based on plastid and nuclear loci. <em>Cladistics</em> 32: 360–389. https://doi.org/10.1111/cla.12136</p>
<p>Zhou, X.-M. & Zhang, L.-B. (2015) A classification of <em>Selaginella</em> (Selaginellaceae) based on molecular (chloroplast and nuclear), macromorphological, and spore features. <em>Taxon</em> 64: 1117–1140. https://doi.org/10.12705/646.2</p>