Squirrel grass is an annual herbaceous plant in the Asteraceae family, belonging to the genus Squirrel grass. The stem is upright with creeping branches at the base, covered in thick white cotton hairs; Using leaves as medicine; The flowers are yellow or pale yellow, with golden or lemon like bracts, yellow in color, membranous, and glossy; The fruit is cylindrical in shape with an inverted or inverted egg shape. The flowering period is from January to April, and the fruiting period is from August to November. The Rat's Nest Grassland is native to southern Africa and is currently distributed in China, North Korea, the Philippines, Indonesia, the Indochinese Peninsula, and India; Distributed in various provinces and regions in China, including Taiwan, East China, South China, North China, Northwest, and Southwest.