Why can "Reporting Rain Flowers" forecast sunny and rainy weather?

This is because its petals are sensitive to humidity. When the humidity in the air increases to a certain extent, the petals will shrink and curl to tightly wrap the stamens; When the humidity in the air decreases, the petals will slowly spread out again. Therefore, local residents should always take a look at the situation of "reporting rain flowers" before going out to understand the weather. If the petals contract, it will rain soon; If the petals open, it won't rain. Therefore, people regard this flower as a "weatherman".

There is also a kind of pink flower, which grows in coastal areas, and people call it "wind rain flower". Whenever this flower blooms in large numbers, it indicates that a typhoon is coming. It turned out that before the arrival of the typhoon, the weather was sultry, the air pressure was reduced, and the transpiration of the leaves of "Yuhua" was enhanced. It stores nutrients and produces a large number of hormones to promote flowering, which makes flowers bloom continuously, so a large number of flowers bloom. Therefore, people can be prepared to prevent typhoons.