Abstract
Senegalia propinqua (Leguminosae: Mimosoideae), a new species from the Yuanjiang dry-hot valley in south-central Yunnan Province, China is described and illustrated. It is compared with S. kunmingensis, S. macrocephala and S. teniana. A distribution map of the four species is provided.
References
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<p>García, M.B., Guzmán, D. & Goñi, D. (2002) An evaluation of the status of five threatened plant species in the Pyrenees. <em>Biological Conservation </em>103 (2): 151–161. https://doi.org/10.1016/S0006-3207(01)00113-6</p>
<p>Harms, H. (1921) Einige Leguminosen aus China. <em>Repertorium specierum novarum regni vegetabilis</em> 17: 133–137. https://doi.org/10.1002/fedr.19210170812</p>
<p>IUCN (2012) IUCN <em>Red List Categories and Criteria: Version 3.1. Second edition.</em> IUCN, Gland, Switzerland and Cambridge, UK, 32 pp.</p>
<p>IUCN (2019) <em>Guidelines for using the IUCN Red List categories and criteria. Version 14</em>. Prepared by the Standards and Petitions Committee, Cambridge U.K. Available from: https://www.iucnredlist.org/resources/redlistguidelines (accessed 28 July 2021)</p>
<p>Lace, J.H. (1915) Some new species from Burma. <em>Bulletin of Miscellaneous Information, Royal Gardens, Kew</em> 1915: 393–407. https://doi.org/10.2307/4113228</p>
<p>Laskey, H., Crook, E.D. & Kimball, S. (2020) Analysis of Rare Plant Occurrence Data for Monitoring Prioritization. <em>Diversity</em> 12: 427. https://doi.org/10.3390/d12110427</p>
<p>Li, X.H., Liu, Y.H., Liu, Y., Xu, Y., Yang, Y. & Shen, Z.H. (2016) Impacts of geographical distances and environmental differences on the beta diversity of plant communities in the dry-hot valley of the Yuanjiang River. <em>Biodiversity Science</em> 24: 399–406. https://doi.org/10.17520/biods.2015245</p>
<p>Maslin, B.R., Ho, B.C., Sun, H. & Bai, L. (2019) Revision of <em>Senegalia </em>in China, and notes on introduced species of <em>Acacia</em>, <em>Acaciella</em>, <em>Senegalia </em>and <em>Vachellia </em>(Leguminosae: Mimosoideae). <em>Plant Diversity</em> 41: 353–480. https://doi.org/10.1016/j.pld.2019.09.001</p>
<p>Maslin, B.R., Seigler, D.S. & Ebinger, J.E. (2013) New combinations in <em>Senegalia </em>and <em>Vachellia </em>(Leguminosae: Mimosoideae) for Southeast Asia and China. <em>Blumea</em> 58: 39–44. https://doi.org/10.3767/000651913X669914</p>
<p>Mishler, B.D., Knerr, N., Gonzaìlez-Orozco, C.E., Thornhill, A.H., Laffan, S.W. & Miller, J.T. (2014) Phylogenetic measures of biodiversity and neo and paleo-endemism in Australian acacia. <em>Nature Communications</em> 5: 4473.</p>
<p>Perrino, E.V., Silletti, G.N., Erben, M. & Wagensommer, R.P. (2018) <em>Viola cassinensis</em> subsp. <em>lucana</em> (Violaceae), a new subspecies from Lucanian Apennine, southern Italy. <em>Phyton</em> 58 (2): 109–115. https://doi.org/10.12905/0380.phyton58(2)-2018-0109</p>
<p>Rafinesque, C.S. (1838) <em>Sylva Telluriana</em>. Printed for the author and publisher, Philadelphia, 184 pp.</p>
<p>Sun, H. (2006) Acacieae. <em>In</em>: Kunming Institute of Botany Chinese Academy of Sciences (Org.) <em>Flora Yunnanica</em>. Science Press, Beijing, pp. 293–307.</p>
<p>Sun, H. & Chen, J. (1990) Taxonomy, distribution and possible floristic origin of the genus <em>Acacia</em> from China. <em>Acta Botanica Yunnanica</em> 12: 255–268, maps.</p>
<p>Tang, C.Q. (2015) <em>The subtropical vegetation of southwestern China: plant distribution, diversity and ecology</em>. Springer, 363 pp. https://doi.org/10.1007/978-94-017-9741-2</p>
<p>Thiers, B. (2021 [continuously updated]) Index Herbariorum. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 17 June 2021)</p>
<p>Wagensommer, R.P., Bartolucci, F., Fiorentino, M., Licht, W., Peccenini, S., Perrino, E.V. & Venanzoni, R. (2017) First record for the flora of Italy and lectotypification of the name <em>Linum elegans</em> (Linaceae). <em>Phytotaxa</em> 296 (2): 161–170. https://doi.org/10.11646/phytotaxa.296.2.5</p>
<p>Wagensommer, R.P., Fröhlich, T. & Fröhlich, M. (2014a) First record of the southeast European species <em>Cerinthe retorta</em> Sibth. & Sm. (Boraginaceae) in Italy and considerations on its distribution and conservation status. <em>Acta Bot. Gallica: Botany Letters</em> 161 (2): 111–115. https://doi.org/10.1080/12538078.2014.892438</p>
<p>Wagensommer, R.P., Perrino, E.V. & Silletti, G.N. (2014b) <em>Carex phyllostachys </em>C.A. Mey. (Cyperaceae) new for Italy and phytogeographical considerations. <em>Phyton (Horn, Austria)</em> 54 (2): 215–222. https://doi.org/10.12905/0380.phyton54(2)2014-0215</p>
<p>Williams, P. & Fong, Y.T. (2010) <em>World Map of Carbonate Rock Outcrops v3.0</em>, The University of Auckland, Auckland. Available from: https://www.fos.auckland.ac.nz/our_research/karst/index.html#karst3 (accessed 26 June 2021)</p>
<p>Zhou, Z., Gu, B.J., Sun, H., Zhu, H. & Tan, Y.H. (2017) Molecular phylogenetic analyses of Euphorbiaceae tribe Epiprineae, with the description of a new genus, Tsaiodendron gen. nov., from south-western China. <em>Botanical Journal of the Linnean Society</em> 184: 167–184. https://doi.org/10.1093/botlinnean/box023</p>
<p>Xu, Y., Huang, J., Lu, X., Ding, Y. & Zang, R. (2019) Priorities and conservation gaps across three biodiversity dimensions of rare and endangered plant species in China. <em>Biology Conservation</em> 229: 30–37. https://doi.org/10.1016/j.biocon.2018.11.010</p>