垂榆又名倒榆,系白榆变种。其形态特征是:枝条修长柔软,弯曲下垂,着生大而浓密互生叶片,几乎遮盖了树干,树冠呈伞形,姿态奇特,形状优美,类似龙爪槐,生长期长,落叶晚,绿叶时间长,有利于净化空气,吸附有毒物质,是优良庭院绿化,园林观赏的好品种。我所1983年冬从蒙古引进种条,经三年的生长和越冬观察,垂榆在我区生长良好,具有耐寒、耐旱、耐盐碱、抗性强等。垂榆采用嫁接繁殖法, Chamomile, also known as inverted elm, Department of white elm variants. Its morphological features are: slender branches soft, curved sag, with a large and densely spaced leaves, almost cover the trunk, crown umbrella, peculiar posture, beautiful shape, similar to Longhuhuai, long growing season, late leaves, green leaves time Long, is conducive to purifying the air, adsorption of toxic substances, is good garden afforestation, ornamental garden good varieties. My winter 1983, the introduction of species from Mongolia, after three years of growth and overwintering observation, weeping plum grow well in our district, with cold, drought, salinity, resistance and so on. Elm plum grafting method,