Citrus limonia, commonly known as the rough lemon, is a hybrid citrus fruit that originated in South Asia. It is characterized by its bumpy, thick skin and sour taste. The fruit is typically yellow when ripe and is often used for its juice, which is more acidic than that of other lemons. This fruit is not only valued for culinary uses but also for its potential health benefits. Citrus limonia is rich in vitamin C and antioxidants, which can support the immune system and promote overall health. It is also used in traditional medicine in various cultures.