Any of various deciduous trees of the genus Ulmus,characteristically having arching or curving branches and serrate leaves with asymmetrical bases. Elms are widely planted as shade trees.

• 榆树，任一种榆属的落叶树木，有拱形或曲线形树枝和锯齿形不对称的树叶。榆树做为蔽阴树被广泛地种植。