corollule

例句：

1. 1.The flower has a beautiful corollule that attracts bees.
   这朵花拥有美丽的花冠，吸引蜜蜂。
2. 2. The plant's calyx is a protective structure around the fruit.
   这种植物的花萼是围绕果实的保护结构。
3. 3. The scientist observed the process of pollen transfer through the corollule.
   科学家通过花冠观察了花粉传递的过程。