Ophiopogon japonicus (Latin name: Ophiopogon japonicus (L. f.) Ker Gawl.), Ophiopogon japonicaceaeHerbaceous plants The root is thick, with oval or spindle-shaped small root in the middle or near the end, and the small root is pale brown and yellow; The stem is very short; The flowers are solitary or paired; The seeds are spherical; The flowering period is from May to August and the fruit period is from August to September. Ophiopogon japonicus, formerly known as Maimondon, derives its name from "Yu Dong". It was first found in the pre-Qin book "Shanhaijing-Zhongshan Jing" in the valley mountain: "Its wood is more than locust, tung, its grass is more than peony, Yu Dong".

Ophiopogon japonicus is native to China and is now distributed in Guangdong, Guangxi, Fujian, Taiwan, Zhejiang and other places, as well as in Japan, Vietnam and India. It is born in the wet hillside, under the forest or beside the stream below 2000 meters above sea level. It likes warm and humid climate conditions with abundant rainfall and shady environment. It is cold-resistant and avoid strong light and high temperature. Breeding methods are mostly ramets.

Ophiopogon japonicus is a top-grade drug recorded in Shennong's Materia Medica, the first pharmaceutical work in China. Because its root tuber is a valuable Chinese herbal medicine, it has become an efficient economic crop planted by farmers. Ophiopogon japonicus is also known as "Yujiu". There is a legend in its origin: after Dayu successfully managed the flood, he ordered the remaining grain to be poured into the river, and a kind of grass, namely Ophiopogon japonicus, grew in the river. People call this grass "Yu Yu Yu". "Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Materia Mater.