金合欢是澳大利亚的国花。每年11月,当北半球的天气渐渐寒冷,位于南半球的澳大利亚则日趋炎热,成片的金合欢开花了。金色的花儿,像一个个小绒球儿,密密麻麻的,感觉热辣辣的;阵阵花香传来,又让人喜气洋洋。金合欢是一种很有特色的植物,容易辨认。首先,它的叶子是羽状复叶,成双成对排列。在澳大利亚的一些地方,金合欢树叶萎缩,叶柄则垂直扁平,代替树叶的功能,被称为叶状柄,垂直方向的叶状柄使它们免受强烈阳光,边缘对着天空和大地则不会像水平分布的树叶那样阻挡光 Acacia is the national flower of Australia. In November each year, when the weather in the northern hemisphere is getting colder, Australia in the southern hemisphere is getting hotter and the acacia blooms. Golden flowers, like a small pompon, dense, feeling hot; bursts of flowers came, but also beaming. Acacia is a distinctive plant that is easy to recognize. First, its leaves are pinnate, arranged in pairs. In some parts of Australia acacia leaves shrink and petiole flattened vertically. Instead of the function of leaves, the leaves are called phyllodes, and the vertical leafy handles keep them from strong sunlight and edges against the sky and the earth. Block light like horizontal leaves