Alternative names of water onion: guan, fuji, guanpu, fucao, onion, guancao, Puping, water onion, cupola, etc.

The scallion belongs to the Cyperaceae family. It mostly grows by lakes or shallow ponds. The roots of the scallion are stolons, which are very strong. There are many fibrous roots on its stems, and its stalks are tall and in the shape of Cylindrical in shape, its roots grow upright and are very straight.

The water onion can grow up to 2 meters. Its plants have few branches and most of its leaves are linear. The longest can reach 11cm. The water onion will bear fruit from June to September every year. The fruits are obovate or oval and can be used for sowing seeds. The flowers of water onion are divided into male flowers and female flowers, and its flowers have certain ornamental value.

The inflorescence of water onion is very large, and its scales are mostly brown, and some are also reddish brown. Water onion has a high demand for water, and often grows in waterside, swamps or wetland grass. . Water onions have certain cold tolerance and can tolerate lower temperatures in a short period of time in winter, but their suitable growth temperature is 15 to 30 degrees.

Water onion has a certain utilization value. Its stems are very hard and very low in density. They can be processed and woven into mats. The mats woven with water onions can be used for a long time without breaking. Water onions also have certain decontamination capabilities. They can effectively remove organic matter, ammonia nitrogen and phosphates in the water during the growth process.