Cassia angustifolia, commonly known as senna, is a flowering plant in the legume family. It is native to regions of Africa and the Middle East and is widely cultivated for its medicinal properties. The leaves and pods of the plant are used to produce herbal remedies, particularly as a natural laxative. The active compounds in Cassia angustifolia stimulate bowel movements, making it effective for treating constipation. It is often found in over-the-counter laxative products. However, it should be used with caution, as excessive consumption can lead to side effects such as abdominal cramps and diarrhea.