North American deciduous tree (Ulmus americana) having double serrate leaves and winged fruits. It is grown chiefly as an ornamental shade tree but often dies from Dutch elm disease.

• 美洲榆：一种北美落叶树（美洲榆），有双齿叶和双翼果，主要作为观赏性浓荫树，但常患荷兰榆树病而坏死