Why do some flowers close at night? 0 11

Dew, settling inside the flower, can wet the pollen, depriving it of its ability to perform reproductive functions. Therefore, dandelions, for example, close not only at night but also during the day in rainy weather.

In addition, petals fold in those flowers that are pollinated by insects active during the day. This helps to prevent pollen from night insects, which pollinate other plants, from landing on them, thereby preventing unwanted cross-pollination. Perhaps this is why some flowers, such as fragrant tobacco and matthiola, close during the day and open at night.