Which plant reproduces by seeds and turions?

The correct answer is the Small Pondweed, which reproduces both by seeds and turions. Turions are small, vegetative buds that can survive adverse conditions and can produce new plants when environmental circumstances improve. This type of reproduction allows the Small Pondweed to effectively increase its population and spread in various aquatic environments.

While other plants may have different methods of reproduction, such as Widgeongrass primarily reproducing through rhizomes and seed, or American Lotus which predominantly relies on seeds and tubers, Small Pondweed's ability to utilize both seeds and turions makes it particularly resilient and adaptable in its habitat. Understanding the reproductive strategies of aquatic plants is crucial for managing and controlling plant populations in aquatic systems.