Macrotyloma uniflorum is a legume and is widely used across Indian sub continent. It s popularly called Kulth or horse gram. If you boil it with or without rice in semi liquid form and eat, it helps to dissolve renal stones. It s decoction can also be drunk frequently. You can also mix Pomegranates seeds crush and holy basil leaves extract or crush Tribulus ( Gokhru) powder in this decoction for better results. A lot of water to be drunk. Ready made syrups viz Cystone and Neeri have also the same effect. Hope it helps you.