Prosopis strombulifera is a species of mesquite or algarrobo, a shrub in the legume family. It is known by the English common names Argentine screwbean and creeping screwbean and the Spanish common name retortuño. This shrub is native to Argentina, where it grows in saline soils. It became well known in California after it was introduced to Imperial County and took hold in the wild, growing as an invasive noxious weed.