【Objective】 The leaf anatomical structures and drought resistances of five Oleaceae ornamental plants in Yan'an urban area were analyzed to improve the understanding on selecting suitable ornamental plants in arid and semiarid regions.【Method】 The leaf anatomical structure of five Oleaceae ornamental plants including Fraxinus chinensis,Syringa oblata,Forsythia viridissima,Ligustrum vicaryi and Forsythia suspensa in Yan'an urban area were observed with paraffin sectioning method and nail enamel seal.Eleven x...