Angiosperms, or flowering plants as they are commonly known, dominate the plant kingdom with over a whopping 3.5 lakh species. Unlike the bisexual plants that are predominant, where both the reproductive structures are present in the same flower of the plant, some have the male and female flowers in different plants. Such plants are called dioecious plants, and there are over 15,600 species of them across the world. Many of these plants have been used traditionally as food, medicine and timber for over thousands of  years.