关键词: 白榆, 品种

Abstract: Ulmus pumila‘Yangguang Nühai’is a new ornamental tree which is selected from the descendant population of U. pumila.‘Yangguang Nühai’is deciduous trees，with straight trunk and broad ovate canopy. The leaves are bigger than ordinary U. pumila，with edge ruffle and base skewed. It produces wide-angled branches with drooping slightly，which has density medium. Annual branche is turquoise. The young trees bark is hoary，smooth，no longitudinal crack，lenticels cross-linkage clear. The scar left by the branches is obvious on adult trees. This variety is suitable for cultivation in northeast，northwest，north and coastal regions of China.

Key words: Ulmus pumila, cultivar