Abstract
Based on observations on both herbarium specimens (including type materials) and living plants in their type localities, we demonstrate that Cirsium paludigenum and C. zhejiangense, two taxa recently described both from Zhejiang province of China, are indistinguishable from C. sieboldii and C. yezoense, two species with their type localities from Japan. We therefore reduce C. paludigenum to the synonymy of C. sieboldii, and C. zhejiangense to the synonymy of C. yezoense. The distribution area of both C. sieboldii and C. yezoense are widely expanded in China.
References
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<p>Diels, L. (1912) Plantae Chinenses Forrestianae. Compositae. <em>Notes from the Royal Botanic Garden, Edinburgh</em> 5: 183–203.</p>
<p>Franchet, A.R. & Savatier, L. (1879) <em>Enumeratio plantarum in Japonia sponte crescentium hucusque rite cognitarum</em>, vol. 2. F.Savy, Paris, 789 pp.</p>
<p>Jin, Z.C. & Chen, Y.S. (2021) The identity of <em>Cirsium henryi</em> (Asteraceae, Cardueae). <em>Phytotaxa</em> 487 (3): 263–272. https://doi.org/10.11646/phytotaxa.487.3.6</p>
<p>Kadota, Y. (1995) <em>Cirsium </em>Mill. <em>In</em>: Iwatsuki, K., Yamazaki, T., Boufford, D.E. & Ohba, H. (Eds.) <em>Flora of Japan</em>, vol. IIIb. Kodansha, Tokyo, pp. 119–151.</p>
<p>Léveillé, H. (1916) <em>Catalogue des Plantes de Yun-Nan</em>. Chez l’Auteur, Le Mans, pp. 36−56.</p>
<p>Lu, Y.F., Chen, Z.H., Sun, W.Y. & Jin, X.F. (2021) Two new species in <em>Cirsium</em> (Asteraceae) from Zhejiang. <em>Journal of Plant Resources and Environment</em> 30: 1−8.</p>
<p>Miller, P. (1754) <em>The Gardeners Dictionary</em> (4th ed.), vol. 1, corrected and enlarged. Printed for the author, London.</p>
<p>Makino, T. (1905) Observations on the Flora of Japan. <em>Botanical Magazine Tokyo</em> 19: 131−160. https://doi.org/10.15281/jplantres1887.19.131</p>
<p>Maximowicz, C.J. (1874) Diagnoses plantarum novarum Japoniae et Mandsuriae. <em>Bulletin de l’Académie Impériale des Sciences de Saint-Pétersbourg</em> 19: 475–540.</p>
<p>Miquel, F.A.G. (1866) Compositae, Prolusio Florae Japonicae. <em>Annales Musei Botanici Lugduno-Batavi</em> 2: 167–191.</p>
<p>Shi, Z. & Greuter, W. (2011) <em>Cirsium</em> Mill. <em>In</em>: Wu, Z.Y. & Raven, P.H. (Eds.) <em>Flora of China</em>, vols. 20−21. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, pp. 160−175.</p>
<p>Shih, C. (1984) Notulae de plantis tribus Cynarearum familiae Compositarum sinicae (Ⅱ). <em>Acta Phytotaxonomica Sinica</em> 22: 386−396.</p>