bracteal leaf

例句：

1. 1.The bracteal leaf of the rose is a beautiful shade of pink.
   玫瑰的花萼叶是美丽的粉色。
2. 2.The scientist found the bracteal leaf to be a valuable source of information.
   科学家发现花萼叶是一种宝贵的信息来源。
3. 3. The bracteal leaf was used as a natural remedy for headaches.
   花萼叶被用作天然的头痛缓解剂。