Trapa natans var. japonica
Trapa natans var. japonica is a floating aquatic plant with a rosette of rhomboid, toothed leaves that provide an ornamental appeal. This variety, with its distinctive spiked, chestnut-like fruits, thrives in still, fresh waters. Ingeniously, trapa natans var. japonica adapts to its watery habitat through inflated petioles that aid buoyancy, ensuring sunlight exposure for photosynthesis.