1, catkin is the seed of willow, with white fluff on it, flying in the wind like catkin, so it is called catkin. Catkin dancing in spring is the way to spread seeds.

2. The fruit of willow is a capsule. When it is mature, it has two petals and contains many seeds. The seed has a tuft of hair, which is a catkin. Grab a group of catkins and observe them carefully, and you will find some small particles inside, which are willow seeds. Willow settled by spreading its seeds far away by flying catkins. Like most plants that spread seeds by the wind, the survival rate of seeds after falling is very low.