golden wattle
noun
1- an Australian acacia with golden flowers（澳大利亚的）金荆树; 密花相思树; 密花金合欢。
1.1
- Genus Acacia, family Leguminosae: A. pycnatha, whose flowers are used as Australia's national emblem, and A. longifolia.金合欢属, 豆科, 密花金合欢 （其花朵是澳大利亚的象征）和长叶相思树。