Cassia fistula Or Amaltas also used in the treatment of cancer, constipation, convulsions, delirium, diarrhea, dysuria, epilepsy, gravel, hematuria, pimples, and glandular tumors. The wood Cassia fistula is durable, hard and heavy, is suited for cabinetwork, farm implements, inlay work, posts, wheels, mortars etc.