Why is the rain flower that can predict the weather?

There is a kind of flower that can forecast wind and rain in Xishuangbanna, Yunnan, called "Rain Flower" (namely, red calamus and lotus). Whenever the wind and rain come, it will be full of vitality and in bud; When the storm comes, it will open quickly, and it is still graceful despite the storm; After the storm, the color is gorgeous, and the bonus is like the sunset, reflecting the mountain cliffs. The local Dai people call it a flower that blooms in the face of ups and downs, and the Dai language calls it "the exotic flower of waxy butterflies".

Yuhua tree is a kind of "wind and rain indicator plant", with oval bulbs, flat and slender leaves and dark green. The flowers are pink with purple bracts. The flowers are shaped like daffodils, with six stamens and T-shaped anthers. When they are in full bloom, they shine like slender lighted wax strips. Rain flower is produced in tropical and subtropical regions and propagated by seeds, but it is customary to transplant bulbs into separate plants. Wind-blown rain flower can also be used as medicine, which is a kind of herbal medicine and is used by the people to treat sores and breast pain.