同义词： American elm water elm rock elm Ulmus americana
white mottling of elm榆白色斑驳病
twenty white elm clones白榆无性系
Russian white elm欧洲白榆
white elm tussock moth杨毒蛾
European White Elm欧洲白榆
American white elm美国榆
white elm clones白榆无性系
white elm tussock杨毒蛾
the appointment of white elm白榆之约
同义词：American elmwater elmrock elmUlmus americana