桉树叶有两个特别引人注目的特征。第一,每株树在其生活的不同周期叶的类型也不同,人们最熟悉的两种叶型是幼态叶及成熟叶。第二,形成桉树树冠的叶通常发展极为迅速。这种能力说明桉树的生活力是很旺盛的,尤其是在没有遭受过食叶害虫毁坏的地方。建立树冠的能力如此之快,是由于树上的这些裸芽在几周内就能生长起一定数量的枝条。甚至假若树冠 Eucalyptus leaves have two particularly compelling features. First, each tree has different types of leaves at different periods of their life. The two most familiar leaf types are young leaves and mature leaves. Second, the leaves that form eucalyptus canopies generally develop very rapidly. This ability to explain the viability of eucalyptus is very strong, especially in areas that have not been subjected to leaf-eating pests. The ability to build canopies is so rapid because these nudges on the tree grow a certain number of branches in a matter of weeks. Even if the canopy