Abstract
A new species, Lysimachia xuyongensis X.F.Gao & W.B.Ju, from China is described and illustrated. The new species morphologically resembles L. miyiensis, L. paridiformis var. stenophylla and L. phyllocephala var. polycephala, but it clearly differs by having stems prostrate at base, dense white multicellular hairs, leave 4, lower scalelike, leaf blades and calyx carrying sparsely reddish glandular punctation, pedicel less than 5 mm, corolla lobes without glandular and ovary glabrous.
References
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<p>Chen, F.H., Hu, C.M., Fang, Y.I. & Cheng, C.Z. (1989) Primulaceae. <em>In:</em> Chen, F.H. & Hu, C.M. (eds.) <em>Flora Reipublicae Popularis Sinicae</em>, vol. 59 (1). Science Press, Beijing, pp. 3–133.</p>
<p>Chien, S.S. (1933) Notes on some species of <em>Lysimachia</em>. <em>Contributions from the Biological Laboratory of the Science Society of China: Botanical Series</em> 9: 24–25.</p>
<p>Franchet, A.R. (1884) Plantes nouvelles de la Chine. <em>Bulletin Mensuel de la Société Linnéenne de Paris</em> 1 (55): 433–434.</p>
<p>Handel-Mazzetti, H. (1928) The revision of the chinesis species of <em>lysimachia</em>, with a New Syslem of the whole Genus. <em>Notes from the Royal Botanic Garden, Edinburgh</em> 16 (77): 51–122.</p>
<p>Hemsley, W.B. (1901) <em>Lysimachia trientalioides</em>. <em>In:</em> Hooker, J.D. (ed.) <em>Icones plantarum or figures</em>, vol. 28. Longman, Rees, Orme, Brown, Green, & Longman, London, plate 2707.</p>
<p>Hu, C.M. & Kelso, S. (1996) Primulaceae. <em>In:</em> Wu, Z.Y. & Raven, P.H. (eds.) <em>Flora of China</em>, vol. 15. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, Missouri, pp. 39–189.</p>
<p>IUCN (2019) <em>Guidelines for using the IUCN red list categories and criteria. version 14. 2019-8</em>. IUCN standards and petitions committee. Cambridge U.K. Available from: http://www.iucnredlist.org/ (accessed 13 October 2021)</p>
<p>Klatt, F.W. (1866) Uebersicht sammtlicher Arten der Gattung <em>Lysimachia</em> L.. <em>Abhandlungen aus dem Gebiete der Naturwissenschaften</em> 4 (4): 1–45.</p>
<p>Linnaeus, C. (1753) <em>Species Plantarum</em>, vols. 1–2. Impensis Laurentii Salvii, Stockholm, Sweden. 1200 pp.</p>
<p>Liu, K., Hong, X., Zhou, S.B., Cheng, Y.S., Tang, C.F. & Xu, H.J. (2014a) A new species of <em>Lysimachia</em> (Myrsinaceae) from Dabieshan Mountain, China. <em>Plant Systematics and Evolution</em> 300 (7): 1615–1620. https://doi.org/10.1007/s00606-014-0986-z</p>
<p>Liu, K., Zhou, S.B., Chen, Y.S. & Hong, X. (2014b) <em>Lysimachia dabieshanensis</em> sp nov (Primulaceae), a new species from Dabieshan Mountain, China. <em>Phytotaxa</em> 174 (2): 119–122. https://doi.org/10.11646/phytotaxa.174.2.8</p>
<p>Mou, C., Wu, Y., Xiang, L., Xiang, X.M. & Zhang, D.G. (2020) <em>Lysimachia xiangxiensis</em> (Primulaceae), a new species from limestone area in Hunan Province, central China. <em>Phytokeys</em> 140: 23–32. https://doi.org/10.3897/phytokeys.140.47995</p>
<p>Pax, F.A. & Knuth, R.G.P. (1905) Primulaceae. <em>In: </em>Engler, A. (ed.) <em>Das Pflanzenreich: regni vegetablilis conspectus</em>. W. Engelmann, Leipzig, 386 pp.</p>
<p>Peng, C.I. & Hu, C.M. (1999) <em>Lysimachia chingshuiensis</em> (Primulaceae), a new species from eastern Taiwan. <em>Botanical Bulletin of Academia Sinica</em> 40: 49–52.</p>
<p>Petitmengin, M. (1907) Nouveaux <em>Lysimachia</em> de Chine. <em>Le Monde des plantes</em> 9 (2): 30–31.</p>
<p>Shao, J.W., Zhang, X.P. & Guo, X.H. (2004) A new species of <em>Lysimachia</em> in Primulacea. <em>Bulletin of Botanical Research</em> 24 (4): 389–391.</p>
<p>Shao, J.W., Zhang, X.P. & Guo, X.H. (2006) <em>Lysimachia dextrorsiflora</em> X. P. Zhang, X. H. Guo & J. W. Shao, a new species of Primulaceae from China. <em>Journal of Systematics and Evolution</em> 44 (5): 589–594. https://doi.org/10.1360/aps050135</p>
<p>Wang, Y., Ma, W., Zhou, S.B. & Liu, K. (2018) <em>Lysimachia tianmaensis</em> (Primulaceae), a new species from Anhui, China. <em>PhytoKeys</em> 98: 117–124. https://doi.org/10.3897/phytokeys.98.23751</p>
<p>Wu, Y.T. (1999) <em>Flora Sichuanica</em>, vol. 13. Sichuan Science and Technology Press, Chengdu, 288 pp.</p>
<p>Yan, H.F., Zhang, C.Y., Anderberg, A.A., Hao, G., Ge, X.J. & Wiens, J.J. (2018) What explains high plant richness in East Asia? Time and diversification in the tribe Lysimachieae (Primulaceae). <em>New Phytologist</em> 219 (1): 436–448. https://doi.org/10.1111/nph.15144</p>
<p>Yi, S.R. (2020) <em>Lysimachia porcatisepala</em>, a new species of <em>Lysimachia</em> (Primulaceae) from Chongqing, China. <em>Phytotaxa</em> 434 (1): 118–122. https://doi.org/10.11646/phytotaxa.434.1.9</p>
<p>Zhou, J.J., Yu, X.L., Deng, Y.F., Yan, H.F. & Lin, Z.L. (2015) <em>Lysimachia huangsangensis</em> (Primulaceae), a New Species from Hunan, China. <em>Plos One</em> 10 (7): 1–13. https://doi.org/10.1371/journal.pone.0132713</p>
<p>Chen, F.H., Hu, C.M., Fang, Y.I. & Cheng, C.Z. (1989) Primulaceae. <em>In:</em> Chen, F.H. & Hu, C.M. (eds.) <em>Flora Reipublicae Popularis Sinicae</em>, vol. 59 (1). Science Press, Beijing, pp. 3–133.</p>
<p>Chien, S.S. (1933) Notes on some species of <em>Lysimachia</em>. <em>Contributions from the Biological Laboratory of the Science Society of China: Botanical Series</em> 9: 24–25.</p>
<p>Franchet, A.R. (1884) Plantes nouvelles de la Chine. <em>Bulletin Mensuel de la Société Linnéenne de Paris</em> 1 (55): 433–434.</p>
<p>Handel-Mazzetti, H. (1928) The revision of the chinesis species of <em>lysimachia</em>, with a New Syslem of the whole Genus. <em>Notes from the Royal Botanic Garden, Edinburgh</em> 16 (77): 51–122.</p>
<p>Hemsley, W.B. (1901) <em>Lysimachia trientalioides</em>. <em>In:</em> Hooker, J.D. (ed.) <em>Icones plantarum or figures</em>, vol. 28. Longman, Rees, Orme, Brown, Green, & Longman, London, plate 2707.</p>
<p>Hu, C.M. & Kelso, S. (1996) Primulaceae. <em>In:</em> Wu, Z.Y. & Raven, P.H. (eds.) <em>Flora of China</em>, vol. 15. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, Missouri, pp. 39–189.</p>
<p>IUCN (2019) <em>Guidelines for using the IUCN red list categories and criteria. version 14. 2019-8</em>. IUCN standards and petitions committee. Cambridge U.K. Available from: http://www.iucnredlist.org/ (accessed 13 October 2021)</p>
<p>Klatt, F.W. (1866) Uebersicht sammtlicher Arten der Gattung <em>Lysimachia</em> L.. <em>Abhandlungen aus dem Gebiete der Naturwissenschaften</em> 4 (4): 1–45.</p>
<p>Linnaeus, C. (1753) <em>Species Plantarum</em>, vols. 1–2. Impensis Laurentii Salvii, Stockholm, Sweden. 1200 pp.</p>
<p>Liu, K., Hong, X., Zhou, S.B., Cheng, Y.S., Tang, C.F. & Xu, H.J. (2014a) A new species of <em>Lysimachia</em> (Myrsinaceae) from Dabieshan Mountain, China. <em>Plant Systematics and Evolution</em> 300 (7): 1615–1620. https://doi.org/10.1007/s00606-014-0986-z</p>
<p>Liu, K., Zhou, S.B., Chen, Y.S. & Hong, X. (2014b) <em>Lysimachia dabieshanensis</em> sp nov (Primulaceae), a new species from Dabieshan Mountain, China. <em>Phytotaxa</em> 174 (2): 119–122. https://doi.org/10.11646/phytotaxa.174.2.8</p>
<p>Mou, C., Wu, Y., Xiang, L., Xiang, X.M. & Zhang, D.G. (2020) <em>Lysimachia xiangxiensis</em> (Primulaceae), a new species from limestone area in Hunan Province, central China. <em>Phytokeys</em> 140: 23–32. https://doi.org/10.3897/phytokeys.140.47995</p>
<p>Pax, F.A. & Knuth, R.G.P. (1905) Primulaceae. <em>In: </em>Engler, A. (ed.) <em>Das Pflanzenreich: regni vegetablilis conspectus</em>. W. Engelmann, Leipzig, 386 pp.</p>
<p>Peng, C.I. & Hu, C.M. (1999) <em>Lysimachia chingshuiensis</em> (Primulaceae), a new species from eastern Taiwan. <em>Botanical Bulletin of Academia Sinica</em> 40: 49–52.</p>
<p>Petitmengin, M. (1907) Nouveaux <em>Lysimachia</em> de Chine. <em>Le Monde des plantes</em> 9 (2): 30–31.</p>
<p>Shao, J.W., Zhang, X.P. & Guo, X.H. (2004) A new species of <em>Lysimachia</em> in Primulacea. <em>Bulletin of Botanical Research</em> 24 (4): 389–391.</p>
<p>Shao, J.W., Zhang, X.P. & Guo, X.H. (2006) <em>Lysimachia dextrorsiflora</em> X. P. Zhang, X. H. Guo & J. W. Shao, a new species of Primulaceae from China. <em>Journal of Systematics and Evolution</em> 44 (5): 589–594. https://doi.org/10.1360/aps050135</p>
<p>Wang, Y., Ma, W., Zhou, S.B. & Liu, K. (2018) <em>Lysimachia tianmaensis</em> (Primulaceae), a new species from Anhui, China. <em>PhytoKeys</em> 98: 117–124. https://doi.org/10.3897/phytokeys.98.23751</p>
<p>Wu, Y.T. (1999) <em>Flora Sichuanica</em>, vol. 13. Sichuan Science and Technology Press, Chengdu, 288 pp.</p>
<p>Yan, H.F., Zhang, C.Y., Anderberg, A.A., Hao, G., Ge, X.J. & Wiens, J.J. (2018) What explains high plant richness in East Asia? Time and diversification in the tribe Lysimachieae (Primulaceae). <em>New Phytologist</em> 219 (1): 436–448. https://doi.org/10.1111/nph.15144</p>
<p>Yi, S.R. (2020) <em>Lysimachia porcatisepala</em>, a new species of <em>Lysimachia</em> (Primulaceae) from Chongqing, China. <em>Phytotaxa</em> 434 (1): 118–122. https://doi.org/10.11646/phytotaxa.434.1.9</p>
<p>Zhou, J.J., Yu, X.L., Deng, Y.F., Yan, H.F. & Lin, Z.L. (2015) <em>Lysimachia huangsangensis</em> (Primulaceae), a New Species from Hunan, China. <em>Plos One</em> 10 (7): 1–13. https://doi.org/10.1371/journal.pone.0132713</p>