English name Tumbleweed, also known as rolling grass. Most people call it the prairie "tramp". It is a common plant in Gobi. When drought comes, it will collect its roots from the soil and roll them into a ball with the wind. On both sides of the highway in Gobi, it is often seen that they roll with the wind when it is windy. This is a plant with strong vitality. Nothing will make them die. One day, they will find an environment suitable for their growth, and then send out new branches, new buds and lavender flowers.

P.beauv.) Spring, Selaginella of Selaginellaceae, is a native or lithophytic resurrected plant with a cushion shape. Reproduction by spores.

Selaginella Selaginella, also known as Jiujiuhuan grass, can separate its roots from the soil by itself, curl up like a fist, move with the wind, be proud when it meets water, and its roots dig into the soil to find water. Because of its strong drought resistance, after a long drought, as long as the roots are soaked in water, they can be elongated again, hence the name.

China, Russian Siberia, Korean Peninsula, Japanese, Indian and Philippine. Most of them were born on sunny hillside rocks or in dry rock crevices. It is produced in most parts of China. Location: Shandong, Liaoning and Hebei. It has both ornamental and medicinal value, and the whole grass has hemostatic and astringent effects. Folk burn the whole grass to ashes, which can cure all kinds of bleeding by oral administration and all kinds of wounds by external use of mixed vegetable oil.

If you watch American movies, that big grass ball should be tumbleweed.