Abstract
Based on critical observations on herbarium specimens (including type material) and living plants in the wild, we demonstrate that Thalictrum panzhihuaense (Ranunculaceae), described from Panzhihua city in southwestern Sichuan province, China, is conspecific with T. glandulosissimum and that T. tsaii, described from Weixi county in northwestern Yunnan province, China, is remarkably closely similar to T. glandulosissimum in all the other characters except the degree of glandulosity on plant body. We therefore place T. panzhihuaense in synonymy with T. glandulosissimum and treat T. tsaii as a variety of T. glandulosissimum, i.e. T. glandulosissimum var. tsaii. The identity of T. glandulosissimum var. chaotungense is also discussed. Lectotypification is proposed for T. glandulosissimum.
References
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<p>Yang, Y., Mo, X. & Liu, B. (2011) <em>Color Flora of the Sichuan Panzhihua Cycas National Nature Reserve in the Valley of the Jinsha River in Southwest China</em>. Higher Education Press, Beijing, 250 pp.</p>
<p>Zeng, Y.P., Yuan, Q. & Yang, Q.E. (2020a) <em>Thalictrum semiscandens</em> (Ranunculaceae), almost totally overlooked since its publication, is merged with <em>T. trichopus</em>. <em>Phytotaxa</em> 451: 283‒293. https://doi.org/10.11646/phytotaxa.451.4.3</p>
<p>Zeng, Y.P., Yuan, Q. & Yang, Q.E. (2020b) <em>Thalictrum mairei</em> (Ranunculaceae) is synonymous with <em>T. foliolosum</em>, not <em>T. leuconotum</em>. <em>Phytotaxa</em> 452: 137‒154. https://doi.org/10.11646/phytotaxa.452.2.3</p>
<p>Candolle, A.P. (1817) Ranunculaceae. <em>In</em>: <em>Regni Vegetabilis Systema Naturale</em>, vol. 1. Treuttel & Würtz, Paris, pp. 127–394.</p>
<p>Finet, A.E. & Gagnepain, F. (1903) Contributions a la flore de l’Asie orientale d’aprés l’herbier du muséum de Paris. <em>Bulletin de la Société Botanique de France</em> 50: 600–625. https://doi.org/10.1080/00378941.1903.10831058</p>
<p>Franchet, A. (1886) Plantas yunnanenses a cl. J. M. Delavay collectas enumerat novasque describit (1). <em>Bulletin de la Société Botanique de France </em>33: 358–467. https://doi.org/10.1080/00378941.1886.10828470</p>
<p>Fu, D.Z. & Zhu, G.H. (2001) <em>Thalictrum</em> Linnaeus. <em>In</em>: Wu, Z.Y., Raven, P.H. & Hong, D.Y. (eds.) <em>Flora of China</em>, vol. 6. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, pp. 282–302.</p>
<p>Hooker, J.D. & Thomson, T. (1855) Ranunculaceae. <em>In</em>: Hooker, J.D. & Thomson, T. (eds.) <em>Flora Indica</em>, vol. 1. W. Pamplin, London, pp. 1–60. https://doi.org/10.5962/bhl.title.50109</p>
<p>Linnaeus, C. (1753) <em>Species Plantarum</em>. Laurentii Salvii, Holmiae, 1200 pp.</p>
<p>McNeill, J. (2014) Holotype specimens and type citations: General issues. <em>Taxon</em> 63: 1112−1113. https://doi.org/10.12705/635.7</p>
<p>Shiao (= Hsiao), P.K. & Wang, W.T. (1965) A study of the Ranunculaceous medicinal plants in China. <em>Acta Pharmaceutica Sinica</em> 12: 745‒753.</p>
<p>Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.-H., Li, D.-Z., Marhold, K., May, T.W., McNeill, J., Monro, A.M., Prado, J., Price, M.J. & Smith, G.F. (2018) <em>International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code)</em>. <em>Regnum Vegetabile </em>159. Koeltz Botanical Books, Glashütten, 254 pp. https://doi.org/10.12705/Code.2018</p>
<p>Wang, W.T. (1982) <em>Thalictrum</em> L. <em>In</em>: Wang, W.T. (Ed.) <em>Iconographia Cormophytorum Sinicorum</em>, suppl. 1. Science Press, Beijing, pp. 410‒431.</p>
<p>Wang, W.T. (2000) <em>Thalictrum</em> L.<em> In</em>: Wu, Z.Y. (Ed.) <em>Flora Yunnanica</em>, vol. 11. Science Press, Beijing, pp. 153–177.</p>
<p>Wang, W.T. (2016) Two new species of Ranunculaceae from China. <em>Bulletin of Botanical Research (Harbin)</em> 36: 1‒3.</p>
<p>Wang, W.T. (2018) <em>Thalictrum (Ranunculaceae) in China</em>. Peking University Press, Beijing, 376 pp.</p>
<p>Wang, W.T. & Wang, S.H. (1979a) Addenda. <em>In</em>: Anonymous (Ed.) <em>Flora Reipublicae Popularis Sinicae, </em>vol. 27. Science Press, Beijing, pp. 603–622.</p>
<p>Wang, W.T. & Wang, S.H. (1979b) <em>Thalictrum</em> L. <em>In</em>: Anonymous (Ed.) <em>Flora Reipublicae Popularis Sinicae</em>, vol. 27. Science Press, Beijing, pp. 502–592.</p>
<p>Wu, C.Y. (1984) <em>Index Florae Yunnanensis</em>, vol. 1. Yunnan People’s Publishing House, Kunming, 1070 pp.</p>
<p>Xie, L., Wang, Z.T., Liu, Q., Li, S.M., Li, Y.S., Song, R.K., Zhao, S.M., Han, L.T., Wang, W., Yu, L., Qian, J.S., Yang, X.W., Zhang, Y.T., Qiao, X., Yang, X.B., Cong, X., Ma, T., Dong, S.Z., Wang, A.N., He, Z.Y. & Pei, J. (2016) <em>Thalictrum</em> L. <em>In</em>: Wei, F.N., Wang, Z.T., Zhang, W.S., Pei, J. & Yang, X.W. (eds.) <em>Medical Flora of China</em>, vol. 3. Peking University Medical Press, Beijing, pp. 231‒287.</p>
<p>Yang, Y., Mo, X. & Liu, B. (2011) <em>Color Flora of the Sichuan Panzhihua Cycas National Nature Reserve in the Valley of the Jinsha River in Southwest China</em>. Higher Education Press, Beijing, 250 pp.</p>
<p>Zeng, Y.P., Yuan, Q. & Yang, Q.E. (2020a) <em>Thalictrum semiscandens</em> (Ranunculaceae), almost totally overlooked since its publication, is merged with <em>T. trichopus</em>. <em>Phytotaxa</em> 451: 283‒293. https://doi.org/10.11646/phytotaxa.451.4.3</p>
<p>Zeng, Y.P., Yuan, Q. & Yang, Q.E. (2020b) <em>Thalictrum mairei</em> (Ranunculaceae) is synonymous with <em>T. foliolosum</em>, not <em>T. leuconotum</em>. <em>Phytotaxa</em> 452: 137‒154. https://doi.org/10.11646/phytotaxa.452.2.3</p>