Abstract
Corydalis nanchuanensis (Papaveraceae), a new species from Nanchuan district in south-west Chongqing, China, is described and illustrated. Morphologically, the new species is similar to C. sheareri, a species mainly distributed in south China and Vietnam, in having conical corolla spurs, divided lower bracts, rounded stigmas, larger elaiosomes (usually longer than seeds), and tubers, but differs by having tapering-to-base (vs. uniformly sized) stems; entire (vs. usually crenate) leaf lobes, straight (vs. declined) pedicels in fruit, concave (vs. subacute) apices of outer petals, white (vs. usually purple) abaxial side of inner petals, and reticulate (vs. tuberculate) seeds.
References
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<p>Lidén, M., Fukuhara, T. & Axberg, T. (1995) Phylogeny of <em>Corydalis</em>, ITS and morphology. <em>Plant Systematics and Evolution</em> 9: 183–188. https://doi.org/10.1007/978-3-7091-6612-3_17</p>
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<p>Moore, S. (1875) Description of some new Phanerogamia collected by Dr. Shearer, at Kiukiang, China. <em>Journal of Botany, British and Foreign </em>13: 225–226.</p>
<p>Ryberg M. (1960) A morphological study of Fumariaceae and the taxonomic significance of the characters examined. <em>Acta Horti Bergiani</em> 19: 121–248.</p>
<p>Wang, D. (2017) <em>Corydalis pseudohemsleyana</em> <em>sp. nov.</em> (Papaveraceae) from Hubei, China. <em>Nordic Journal of Botany</em> 35: 593–597. https://doi.org/10.1111/njb.01553</p>
<p>Wang, D., Xu, X.D. & Gan, Q.L. (2017) <em>Corydalis pseudoamplisepala</em> (Papaveraceae), a new species from NW Hubei, China. <em>Annales Botanici Fennici</em> 54: 223–227. https://doi.org/10.5735/085.054.0604</p>
<p>Wang, D., Xu, X.D. & Liu, P. (2017) <em>Corydalis hualongshanensis</em>, a new species of <em>Corydalis</em> sect. <em>Fumarioides</em> (Papaveraceae) from Shaanxi, China. <em>Phytotaxa</em> 307: 153–158. https://doi.org/10.11646/phytotaxa.307.2.7</p>
<p>Wang, W., Lu, A.M., Ren, Y., Endress, M.E. & Chen, Z.D. (2009) Phylogeny and classification of Ranunculales: evidence from four molecular loci and morphological data. <em>Perspectives in Plant Ecology, Evolution and Systematics</em> 11: 81–110. https://doi.org/10.1016/j.ppees.2009.01.001</p>
<p>Wang, W.T. (2017) Two new species of Fumariaceae. <em>Guihaia</em> 37: 1083–1087.</p>
<p>Wang, Y.W. (2006) Systematics of <em>Corydalis</em>. Ph.D. dissertation, University of Chinese Academy of Sciences, Beijing, pp. 1–118.</p>
<p>Wu, C.Y. & Chuang, H. (1990) A new section of <em>Corydalis</em>, sect. <em>Davidianae</em>. <em>Acta Botanica Yunnanica</em> 12: 279–286. https://doi.org/10.1007/s10891-014-0990-8</p>
<p>Wu, C.Y. & Chuang, H. (1991) The classification and distribution of Chinese <em>Corydalis</em> sect. <em>Asterostigmata</em>. <em>Acta Botanica Yunnanica</em> 13: 121–138.</p>
<p>Wu, C.Y., Su, Z.Y. & Lidén, M. (1997) <em>Corydalis</em> in China Ⅰ: Some new species. <em>Edinburgh Journal of Botany</em> 54: 55–84. https://doi.org/10.1017/S0960428600003863</p>
<p>Wu, C.Y., Chuang, H. & Su, Z.Y. (1996) Relationship between phylogeny and floristic division of <em>Corydalis</em>. <em>Acta Botanica Yunnanica</em> 18: 241–267.</p>
<p>Wu, C.Y., Chuang, H. & Su, Z.Y. (1999) <em>Corydalis</em> DC.<em> In: </em>Wu, Z.Y. (Ed.) <em>Flora Reipublicae Popularis Sinicae</em>, vol. 32. Science Press, Beijing, pp. 96–481.</p>
<p>Yi, S.R., Huang, Y., Quan, J., Pei, L.R. & Lei, M.Y. (2015) The new information of spermatophyte flora in Chongqing, China. <em>Subtropical Plant Science</em> 44: 250–252.</p>
<p>Zhang, M.L., Su, Z.Y. & Lidén, M. (2008) <em>Corydalis</em> DC.<em> In: </em>Wu Z.Y., Raven P. H. & Hong D.Y. (Eds.) <em>Flora of China</em>, vol. 7. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, pp. 295–428.</p>
<p>Candolle, A.P. de (1805) <em>Corydalis</em>.<em> In: </em>Candolle, A.P. de & Lamarck, J.B.A.P. de M. de (Eds.) <em>Flore Française</em> (3rd. ed.), vol. 5. Desray Press, Paris, pp. 636–638.</p>
<p>Hoot, S.B., Wefferling, K.M. & Wulff, J.A. (2015) Phylogeny and character evolution of Papaveraceae s.l. (Ranunculales). <em>Systematic Botany</em> 40: 474–488. https://doi.org/10.1600/036364415X688718</p>
<p>Lidén, M., Fukuhara, T. & Axberg, T. (1995) Phylogeny of <em>Corydalis</em>, ITS and morphology. <em>Plant Systematics and Evolution</em> 9: 183–188. https://doi.org/10.1007/978-3-7091-6612-3_17</p>
<p>Lidén, M., Fukuhara, T., Rylander, J. & Oxelman, B. (1997) Phylogeny and classification of Fumariaceae, with emphasis on <em>Dicentra</em> s.1., based on the plastid gene rpsl6 intron. <em>Plant Systematics and Evolution</em> 206: 411–420. https://doi.org/10.1007/BF00987960</p>
<p>Mikhailova, M.A. (2019) A new species of <em>Corydalis</em> (Fumariaceae) from Gansu (China). <em>Novitates Systematicae Plantarum Vascularium</em> 50: 115–119. https://doi.org/10.31111/novitates/2019.50.115</p>
<p>Moore, S. (1875) Description of some new Phanerogamia collected by Dr. Shearer, at Kiukiang, China. <em>Journal of Botany, British and Foreign </em>13: 225–226.</p>
<p>Ryberg M. (1960) A morphological study of Fumariaceae and the taxonomic significance of the characters examined. <em>Acta Horti Bergiani</em> 19: 121–248.</p>
<p>Wang, D. (2017) <em>Corydalis pseudohemsleyana</em> <em>sp. nov.</em> (Papaveraceae) from Hubei, China. <em>Nordic Journal of Botany</em> 35: 593–597. https://doi.org/10.1111/njb.01553</p>
<p>Wang, D., Xu, X.D. & Gan, Q.L. (2017) <em>Corydalis pseudoamplisepala</em> (Papaveraceae), a new species from NW Hubei, China. <em>Annales Botanici Fennici</em> 54: 223–227. https://doi.org/10.5735/085.054.0604</p>
<p>Wang, D., Xu, X.D. & Liu, P. (2017) <em>Corydalis hualongshanensis</em>, a new species of <em>Corydalis</em> sect. <em>Fumarioides</em> (Papaveraceae) from Shaanxi, China. <em>Phytotaxa</em> 307: 153–158. https://doi.org/10.11646/phytotaxa.307.2.7</p>
<p>Wang, W., Lu, A.M., Ren, Y., Endress, M.E. & Chen, Z.D. (2009) Phylogeny and classification of Ranunculales: evidence from four molecular loci and morphological data. <em>Perspectives in Plant Ecology, Evolution and Systematics</em> 11: 81–110. https://doi.org/10.1016/j.ppees.2009.01.001</p>
<p>Wang, W.T. (2017) Two new species of Fumariaceae. <em>Guihaia</em> 37: 1083–1087.</p>
<p>Wang, Y.W. (2006) Systematics of <em>Corydalis</em>. Ph.D. dissertation, University of Chinese Academy of Sciences, Beijing, pp. 1–118.</p>
<p>Wu, C.Y. & Chuang, H. (1990) A new section of <em>Corydalis</em>, sect. <em>Davidianae</em>. <em>Acta Botanica Yunnanica</em> 12: 279–286. https://doi.org/10.1007/s10891-014-0990-8</p>
<p>Wu, C.Y. & Chuang, H. (1991) The classification and distribution of Chinese <em>Corydalis</em> sect. <em>Asterostigmata</em>. <em>Acta Botanica Yunnanica</em> 13: 121–138.</p>
<p>Wu, C.Y., Su, Z.Y. & Lidén, M. (1997) <em>Corydalis</em> in China Ⅰ: Some new species. <em>Edinburgh Journal of Botany</em> 54: 55–84. https://doi.org/10.1017/S0960428600003863</p>
<p>Wu, C.Y., Chuang, H. & Su, Z.Y. (1996) Relationship between phylogeny and floristic division of <em>Corydalis</em>. <em>Acta Botanica Yunnanica</em> 18: 241–267.</p>
<p>Wu, C.Y., Chuang, H. & Su, Z.Y. (1999) <em>Corydalis</em> DC.<em> In: </em>Wu, Z.Y. (Ed.) <em>Flora Reipublicae Popularis Sinicae</em>, vol. 32. Science Press, Beijing, pp. 96–481.</p>
<p>Yi, S.R., Huang, Y., Quan, J., Pei, L.R. & Lei, M.Y. (2015) The new information of spermatophyte flora in Chongqing, China. <em>Subtropical Plant Science</em> 44: 250–252.</p>
<p>Zhang, M.L., Su, Z.Y. & Lidén, M. (2008) <em>Corydalis</em> DC.<em> In: </em>Wu Z.Y., Raven P. H. & Hong D.Y. (Eds.) <em>Flora of China</em>, vol. 7. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, pp. 295–428.</p>