An annual broadleaf weed. Aquatic, and a pest in cultivated fields of rice, as well as shallow irrigation and drainage ditches, roadside ditches, shallow ponds and reservoirs. Plants will die if the water is drained and the soil dries. In warm humid conditions it is capable of growing for well over a year. Mature plant is trailing, with fleshy stems that develop roots at the nodes. Stems are branched and may grow to 20 inches long. Reproduction is by seeds that germinate in the spring when standing water is present. Flowering continues from early to late summer.
Standing water is necessary for growth. Drying of the soil kills the plant.