smoke tree

smoke-tree的词性：
n.（名词）

1. Either of two deciduous plants, Cotinus obovatus, a tree of the southern United States, or C. coggygria, a shrub of Eurasia, having plumelike clusters of small yellowish flowers.
黄栌，烟树：两种落叶植物之一，美国南部的一种树楔形黄栌 或一种有羽毛状浅黄花串的亚欧灌木树 卵形黄栌

smoke-tree的词源：

2. [From the resemblance of the flower clusters to puffs of smoke]
[源于其花串与蓬松状烟雾的相似性]