ULMUS RUBRA 拉丁文名
American red elm Ulmus rubra 美国红榆
Slippery Elm (Ulmus rubra) bark was used both internally and externally by native Americans and early pioneer settlers.
榆(榆树杨梅)用树皮内部和外部的土生土长的美国人和早期定居者的先驱。
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