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对节白蜡（ＦｒａｘｉｎｕｓｈｅｐｅｈｅｎｓｉｓＣｈｉｎ．ＳｈａｎｇｅｔＳｕ）ｈ中国特有的珍稀濒危树木，仅分布于湖北省钟祥市与京山县交界的大洪山余脉的窄小地区内，形成该地带内特有的植被类型。
The rare and endangered trees unique to China, Fraxinus hepehensis Chin. Shangetsu h, are only located in the narrow area of the Dahongshan remnant vein at the junction of Zhongxiang City and Jingshan County in Hubei Province, forming the peculiar vegetation type in this zone.