现在城市园林中的观叶植物,尤其是色叶植物的应用已有一定的比例,如金叶女贞、紫叶小檗、紫叶李等。其中,双色叶植物是色叶植物中不可或缺的一员(顾名思义,是指叶正反两面色彩有明显差异的植物)。南方常见的有红背桂等,北方虽有银白杨,但它是落叶树种,冬季叶片脱落就没有什么景观了。那么北方有没有四 Now urban landscape foliage plants, especially leafy plants have a certain proportion of the application, such as the golden privet, purple barberry, purple plum and so on. Among them, two-color leafy plants are an integral part of leafy plants (as the name suggests, refers to the positive and negative color of the leaves have significant differences in plants). Southern common red back Gui, although the northern poplar, but it is deciduous species, the winter leaves off there is no landscape. Then there are four in the north