Ulmus davidiana Planchon var. japonica (Rehder) Nakai Distribution : Japan, Korea, Mongolia, Siberia, China (Anhui, Gansu, Hebei, Heilongjiang, Henan, Hubei, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Zhejiang) Description in Fl. Sylv. Kor. 19: 26. 1932
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