Definition
Water caltrop refers to aquatic plants in the genus *Trapa*. These plants have floating leaves and submerged roots, living entirely in water. 🌊 They are like tiny floating islands. Some species have edible nuts, making them an important food source in certain regions. However, other species are invasive and can harm local ecosystems. They show that a plant can be both a resource and a threat. Different types of water caltrop have adapted to various conditions.