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Crataegus purpurea var. altaica Loudon
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Flora of China Editorial Committee. 2003. Flora of China (Pittosporaceae through Connaraceae). 9: 1–496. In C. Y. Wu, P. H. Raven & D. Y. Hong (eds.) Fl. China. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
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Crataegus sanguinea var. incisa Regel
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Flora of China Editorial Committee. 2003. Flora of China (Pittosporaceae through Connaraceae). 9: 1–496. In C. Y. Wu, P. H. Raven & D. Y. Hong (eds.) Fl. China. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
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Crataegus sanguinea var. inermis Kar. & Kir.
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Flora of China Editorial Committee. 2003. Flora of China (Pittosporaceae through Connaraceae). 9: 1–496. In C. Y. Wu, P. H. Raven & D. Y. Hong (eds.) Fl. China. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
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Crataegus wattiana var. incisa C.K. Schneid.
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Flora of China Editorial Committee. 2003. Flora of China (Pittosporaceae through Connaraceae). 9: 1–496. In C. Y. Wu, P. H. Raven & D. Y. Hong (eds.) Fl. China. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
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