The String of Bananas Plants for Sale Online Senecio radicans, commonly known as string-of-bananas or fishhook Senecio, is a creeping succulent vine whose leaves resemble bananas. It is native to the drier parts of southwest Africa. Its stems grow along the ground in its natural environment, rooting where they touch and forming dense mats of bananas. Grows best in low light conditions. This is a fast-growing house plant.