Sesbania tomentosa, also known as Oahu Riverhemp, is a species of flowering plant in the Fabaceae (pea) family, native to the Hawaiian Islands and the Necker and Nihoa Islands.
It occurs mainly in low scrublands and dry forests from sea level to 760 meters (2,500 feet). ATVs, forest fires, grazing, and competition from exotic species have destroyed their habitat on the main islands.
