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大果榆属于榆科榆属落叶乔木,别名黄榆、毛榆、柳榆。新疆伊犁、乌鲁木齐、昌吉、石河子、奎屯等地均可栽培。一、生物学特性树高达20米,树冠扁球形。先开花后展叶,花两性,绿色;雄蕊与花被片同数,花药大,带黄玫瑰色。种子位于翅果中部,翅果倒卵形、近圆形或宽椭圆形。树皮灰黑或灰褐色,浅纵裂。花期4～5月,4月上旬～下旬开花,4月上旬萌动期,4月中、下旬展叶,果期5～6月,10月上旬开始落叶。
Large fruit elm belonging to Elm elm deciduous trees, alias Huang Yu, Mao Yu, Liu Yu. Xinjiang Ili, Urumqi, Changji, Shihezi, Kuitun and other places can be cultivated. First, the biological characteristics of trees up to 20 meters, the crown spherical. First flowering leaves, flowers bisexual, green; stamens and tepals the same number, large anthers, with yellow rose. Seeds in the middle of the samara, winged fruit obovate, suborbicular or broadly elliptic. Bark gray-black or gray-brown, shallow longitudinal split. Flowering from April to May, early April to late flowering, early April sprouting period, April mid-late leaf exhibition, the fruit period from May to June, early October deciduous.