Nymphaea mexicana is a species of aquatic plant that is native to the Southern United States and Mexico as far south as Michoacán. Common names include yellow waterlily, Mexican waterlily and banana waterlily. Nymphaea mexicana is perhaps best known as a noxious weed in wetlands outside of its native range, such as California. It can easily invade similar aquatic ecosystems when it is introduced. The plant is attractive and has been introduced to new habitats for ornamental purposes. The canvasback duck feeds on the banana-like roots of the plant.