Abstract
Impatiens longyangensis and I. yaojiapingensis, two new species from Gaoligong Mountains, Yunnan, China, are described here. The former species is morphologically similar to I. shangjiangensis, but differs by its shorter petioles and peduncle, ovate bract, shortly saccate lower sepal with a longer spur and suborbicular dorsal petal. The latter is similar to I. sterilis, and differs by its pubescent leaf, petiole with one to three pairs of clavate glands, persistent bract, lower sepal with a straight spur and suborbicular dorsal petal. Molecular phylogenetic analysis based on nuclear ITS and plastid atpB-rbcL sequences shows that the two new species belong to I. sect. Racemosae.
References
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<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Forst, J.R. & Forst, G. (1776) Characteres generum plantarum, quas in itinere ad insulas maris Australis, 150 pp. https://doi.org/10.5962/bhl.title.4448</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Gu, J.Z., Yang, N., Peng, Y.C., Song, Y.X., Guo, S.W. & Cong, Y.Y. (2021) Impatiens shangjiangensis (Balsaminaceae), a new species from Yunnan, China. Annales Botanici Fennici 58: 197–201. http://dx.doi.org/10.5735/085.058.0401 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Guindon, S., Dufayard, J.F., Lefort, V., Anisimova, M., Hordijk, W. & Gascuel, O. (2010) New Algorithms and Methods to Estimate Maximum-Likelihood Phylogenies: Assessing the Performance of PhyML 3.0. Systematic Biology 59 (3): 307–321. https://dx.doi.org/10.1093/sysbio/syq010</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Handel-Mazzetti. (1933) Symbolae Sinicae, vol. 7. Springer, J., Wien, 2364 pp. https://doi.org/10.5962/bhl.title.878</span></span></span>
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<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Janssens, S., Geuten, K., Yuan, Y.M., Song, Y., Küpfer, P. & Smets, E. (2006) Phylogenetics of Impatiens and Hydrocera (Balsaminaceae) using chloroplast atpB-rbcL spacer sequences. Systematic Botany 31 (1): 171–180. https://doi.org/10.1600/036364406775971796</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kalyaanamoorthy, S., Minh, B.Q., Wong, T.K., von Haeseler, A. & Jermiin, L.S. (2017) ModelFinder: Fast model selection for accurate phylogenetic estimates. Nature Methods 14 (6): 587–589. https://doi.org/10.1038/nmeth.4285</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kumar, S., Stecher, G., Li, M., Knyaz, C. & Tamura, K. (2018) MEGA X: Molecular Evolutionary Genetics Analysis across Computing Platforms. Molecular Biology and Evolution 35 (6): 1547–1549. https://doi.org/10.1093/molbev/msy096</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Li, H., Huang, H.Q. & Huang, M.J. (2013) Investigation and application of Impatiens L. resource in Yunnan. Northern Horticulture 10: 91–94.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Liao, R.L., Cai, L., Yu, Z.Y., Wang, Y.H. & Sun, W.B. (2021) Impatiens wutaishanensis (Balsaminaceae), a new species from Southeast Yunnan, China. PhytoKeys 176: 43–53. https://doi.org/10.3897/phytokeys.176.58825</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Linnaeus, C. (1753) Species Plantarum. Salvius, Stockholm, 1200 pp. https://doi.org/10.5962/bhl.title.669</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Liu, C.J., Lin, Q. & He, J.X. (2004) Methods and terminology of study on seed morphology from China. Acta Botanica Boreali-occidentalia Sinica 24: 178–188.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Lu, Y.Q. (1991) Pollen morphology of Impatiens L. (Balsaminaceae) and its taxonomic implications. Journal of Systematics and Evolution 29 (4): 352–357. </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Lu, Y.Q. & Chen, Y.L. (1991) Seed morphology of Impatiens L. (Balsaminaceae) and its taxonomic implications. Journal of Systematics and Evolution 29 (3): 252–257</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Myers, N., Mittermeier, R.A., Mittermeier, C.G., da Fonseca, G.A.B. & Kent, J. (2000) Biodiversity hotspots for conservation priorities. Nature 403: 853–858. https://doi.org/10.1038/35002501</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Nees, E. (1836) Systema laurinarum. Berolini, Sumptibus Veitii et Sociorum, 720 pp. https://doi.org/10.5962/bhl.title.422</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Nguyen, L.T., Schmidt, H.A., von Haeseler, A. & Minh, B.Q. (2014) IQ-TREE: A Fast and Effective Stochastic Algorithm for Estimating Maximum-Likelihood Phylogenies. Molecular Biology and Evolution 32 (1): 268–274. https://doi.org/10.1093/molbev/msu300</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Peng, S., Cong, Y.Y., Tian, J., Zhang, C.F., Hu, G.W. & Wang, Q.F. (2021a) Impatiens bullatisepala (Balsaminaceae), a new species from Guizhou, China. Phytotaxa 500 (3): 217–224. https://doi.org/10.11646/phytotaxa.500.3.5</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Peng, S., Rono, P.C., Yang, J.X., Wang, J.J., Hu, G.W. & Wang, Q.F. (2021b) Description of a new species and lectotypification of two names in Impatiens sect. Racemosae (Balsaminaceae) from China. Plants 10 (9): 1812. https://doi.org/10.3390/plants10091812</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Qian, L.S., Chen, J.H., Deng, T. & Sun, H. (2020) Plant diversity in Yunnan: Current status and future directions, Plant Diversity 42 (4): 281–291. https://doi.org/10.1016/j.pld.2020.07.006.</span></span></span>
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