Do you know any plants related to the weather?

Plants not only provide people with oxygen and fruits, but also can forecast the weather. In the production process, people have observed the law of some plants predicting the weather.

Forecast rainy weather

Rain grass grows in the dense forest of Xishuangbanna, China, and can forecast wind and rain. The flowering habit of Rainflower is very special, and there is no fixed time. But every two or three days before the storm comes, its small and exquisite flowers will bloom. And after the storm, its flowers bloom more neatly and brightly, as if only after the baptism of the storm can it show its true colors.

When the weather is clear, the shoots of pumpkin vines grow upward. If the pumpkin vines are found drooping, it is a sign that the weather is turning to rain; If it's rainy. Pumpkin vines turn from drooping to upturning, indicating that rainy weather is coming to an end and sunny days are coming.

"Mimosa is shy and it will rain." When the weather is normal, you touch its petiole with your finger, and the leaves will close immediately, but will soon return to normal. If you don't touch it with your fingers, the leaves will naturally droop and close, which is a sign of rainy weather.

In the Andes of Peru, there is a kind of peculiar "rain flower", the petals are tight and seamless, and the water absorption and air permeability are very weak. So whenever the air pressure is low and the water vapor density in the air is saturated before rain, the dew in the depths of stamens disappears. This phenomenon indicates that the sunny weather is about to pass and the rainy day is coming.

In hot summer, a small cloud of water will come out at the junction of leaves and stems of thatched grass, just like crabs spitting, so the folk have summed up the agricultural proverb "thatched stalks spit and work in the rain tomorrow".

When the air humidity is high, the scales of pine cones will shrink, which is a report of rain. When the air is dry, the scales of pine cones will open, which indicates that the weather is about to turn from rainy to sunny. Before the rainstorm, the air pressure dropped sharply and the water surface pressure decreased. At this time, the moss at the bottom of the river will surface, so the farmer said, "When the river is covered with moss, it will rain heavily."

Predicted temperature

In southern Sweden, there is a kind of grass called "Tricolor Ghost", which is called "natural thermometer" because it is extremely sensitive to temperature changes. When the temperature is above 20℃, its leaves all extend obliquely upward; If the temperature drops to 15℃, the branches and leaves will move down until they are parallel to the ground. When the temperature drops to 10℃, the branches and leaves bend downward; If the temperature rises to its original state, the leaves will return to their original state.

Chestnut trees are not only sensitive, but also can predict the weather. After winter, when bad weather such as frost or snowfall is predicted, it will germinate several weeks in advance. Studies have proved that chestnut trees "measure" the length of night time, which indicates the arrival of severe winter.

In the northeastern province of China, farmers like to plant Guizijiang in front of their houses or behind their fields and pickle pickles with its tubers. According to observation, Guizijiang can accurately predict the first frost, which falls about 10 day after flowering, reminding farmers to prepare for frost prevention and antifreeze.