Trapa bicornis

Trapa bicornis, a member of the Lythraceae family, is a perennial plant native to regions including Amur, Angola, Assam, Bangladesh, Botswana, Burkina Faso, Cameroon, and many other countries across Asia and Africa. This plant thrives in full sun and requires waterlogged conditions, making it ideal for wetland habitats such as ponds or water gardens. It can grow in various soil types—light (sandy), medium, or heavy (clay)—and is hardy in zones 4-8. Trapa bicornis is known for its edible seeds, which are typically harvested and prepared by roasting or boiling before consumption to ensure safety and enhance flavor. The distinctive feature of this plant is the presence of two horns on its fruit, which aids in dispersal through water. This ornamental plant not only adds visual interest with its unique fruit but also serves as a useful food source. While Trapa bicornis can be found in its native habitats across Asia and Africa, it has been introduced to Nansei-shoto, indicating its adaptability to new environments. Cultivating this plant requires mimicking its natural growing conditions, ensuring full sun exposure and consistent moisture.