Panicum hemitomon is a species of grass known by the common name maidencane. It is native to North America, where it occurs along the southeastern coastline from New Jersey to Texas. It is also present in South America.
This plant is a rhizomatous perennial grass with stems reaching up to 2 meters in height. It is aquatic or semi-aquatic, growing in water or wet soils. It spreads via its rhizome to form large colonies. The canelike roots are filled with air and form a mass up to 46 centimeters wide. The stems may be erect or spreading; if nodes on the stem contact moist substrate they will root. Stems that break off and float away may root where they land. There are fertile and sterile stems. The leaves are up to 35 centimeters long by 1.5 wide and have tapering tips. The inflorescence is a panicle with upright branches.