Cách sử dụng
A catkin is a type of flower cluster that grows on certain trees and bushes, such as willows and birches. The catkin is usually long and narrow, and it droops down from the stem. The flowers in the catkin are small and often have no petals, but they have lots of pollen. The word "catkin" comes from an old Dutch word that means "kitten," because the flower clusters look a bit like a kitten's tail.